Publications (INTERNATIONAL) Journal Papers A.1 A. Zafer, R.S. Dahiya., Oscillation of Bounded solutions of Neutral Differential Equations. "Appl. Math. Lett.", 6, (1993), p.4346. A.2 A. Zafer, R.S. Dahiya, Oscillatory and Asymptotic Behavior of Solutions of Third Order Delay Differential Equations with forcing Terms. "Differential Equations Dynam. Sysytems", 1, (1993), p.123136. A.3 A. Zafer, R. S. Dahiya, Oscillation of a Neutral Difference Equation. "Appl. Math. Lett.", 6, (1993), p.7174. A.4 A. Zafer, Oscillatory and Asymptotic Behavior of Higher order Difference Equations. "Mathl. and Comput. Modelling", 21, (1995), p.4350. A.5 R. S. Dahiya, A. Zafer, Asymptotic Behavior and Oscillation in Higher Order Nonlinear Differential Equations with retarded arguments. "Acta Math. Hungar", 76, (1997), p.233242. A.6 H. Taşeli, A. Zafer, Bessel Basis with Applications: Ndimensional Isotropic Polynomial Oscillators. "Int. J. Quantum Chem.", 63, (1997), p.935947. A.7 H. Taşeli, A. Zafer, A Fourier Bessel Expansion for Solving Schrödinger Equation in Two Dimensions. "Int. J. Quantum Chem.", 61, (1997), p.759768. A.8 A. Zafer , B. Kaymakçalan, S. A. Özgün, Asymptotic Behavior of Higher Order Nonlinear Equations on Time Scales. "Comput. Math. Applic.", 36, (1998), p.299306. A.9 A. Zafer, Necessary and Sufficient Condition for Oscillation of Higher Order Nonlinear Delay Difference Equations. "Comput. Math. Applic.", 35, (1998), p.125130. A.10 A. Zafer, H. Taşeli, Twosided Eigenvalue Bounds for the Spherically Symmetric States of the Schrödinger Equation. "J. Comput. Appl. Math", 95, (1998), p.83100. A.11 A. Zafer, R. S. Dahiya, Oscillation Theorems for Higher Order Neutral Type Differential Equations. "Discrete Contin. Dynam. Systems (Added Volume 2)", 2, (1998), p.203219. A.12 A. Zafer, The Existence of Positive Solutions and Oscillation of Solutions of Higher Order Difference Equations on Time Scales. "Comput. Math. Applic.", 36, (1998), p.2735. A.13 A. Zafer, Oscillation Criteria for Even Order Neutral Differential Equations. "Appl. Math. Lett.", 11, (1998), p.2125. A.14 M. Akhmetov, A. Zafer, The Contollability of Boundary Value Problems for Quasilinear Impulsive Systems. "Nonlinear Analysis, TMA", 34, (1998), p.10551065. A.15 Y. (Sahiner) Yilmaz, A. Zafer, Oscillation of Even Order Nonlinear Neutral Differential Equations with Damping. "Math. Inequal. Appl", 1, (1998), p.445451. A.16 M. Akhmetov and A. Zafer, Controllability of the Vall\'eePoussin Problem for Impulsive Differential Systems.. "J. Optim. Theory Appl.", 102, (1999), p.263276. A.17 Y. Şahiner Yılmaz and A. Zafer, Oscillation of Second Order Nonlinear Neutral Differential Equations with Damping. "Functional Differential Equations (Journal)", 6, (1999), p.203214. A.18 M. Akhmetov and A. Zafer, Successive Approximation Method for Impulsive Differential Equations with Control.. "Appl. Math. Lett.", 13, (2000), p.99105. A.19 M. Akhmetov and A. Zafer, Stability of the Zero Solution of Impulsive Differential Equations by the Lyapunov Second Method. . "J. Math. Anal. Appl.", 248, (2000), p.6982. A.20 Y. Şahiner and A. Zafer, Bounded oscillation of nonlinear differential equations of arbitrary order. "Czech. Math. Journal", 51, (2001), p.185195. A.21 M. Akhmetov, A. Zafer, and R. Sejilova, The control of boundary value problems for quasilinear impulsive integrodifferential equations.. "Nonlinear Anal.", 48, (2002), p.271286. A.22 Ağacık Zafer, Applications of Langenhop inequality to difference equations: lower bounds and oscillation. , (3) (2003), 8087.. "Appl. Math. ENotes", 3, (2003), p.8087. A.23 A. Zafer, Review of "On the oscillation of certain functional differential equations. Commun. Korean Math. Soc. 19 (2004), no. 2, 307319 by Agarwal, Ravi P.Grace, S. R.; Dontha, S.". "AMS REVIEWS", 2004m:3414, (2004). A.24 A. Tiryaki, A. Zafer, Oscillation of Second Order Nonlinear Differential Equations with Nonlinear Damping.. "Math. Comput. Modelling", 39, (2004), p.197208. A.25 J. Alzabut, A. Zafer, Oscillation criteria for second order impulsive delay differential equations. "AIP Conf. Proc.", 729, (2004), p.317324. A.26 M. Akhmet, A. Zafer, Controllability of twopoint nonlinear boundaryvalue problems by the numericalanalytic method.. "Appl. Math. Comput", 151, (2004), p.729744. A.27 A. Özbekler and A.Zafer, Sturmian comparison theory for linear and halflinear impulsive differential equations. "Nonlinear Analysis, TMA", 63, (2005), p.289297. A.28 A.Zafer, On asymptotic equivalence of linear and quasilinear difference equations. "Applicable Analysis", 84, (2005), p.899908. A.29 A.Tiryaki and A. Zafer, Interval oscillation of a general class of second order nonlinear differential equations with nonlinear damping. "Nonlinear Analysis, TMA", 60, (2005), p.4963. A.30 A.F. Güvenilir and A. Zafer, Secondorder oscillation of forced functional differential equations with oscillatory potentials.. "Comput. Math. Appl.", 51, (2006), p.13951404. A.31 A. Zafer, The exponential of a constant matrix on time scales, 48 (2006),. "ANZIAM J.", 48, (2006), p.99106. A.32 A Özbekler and A. Zafer, Picone's formula for second order linear impulsive differential equations. "J. Math. Anal. Applic.", 319, (2006), p.410–423. A.33 M. Akhmet, J. Alzabut, A.Zafer, Perron's theorem for linear impulsive differential equations with distributed delay. "J. Comput. Appl. Math.", 193, (2006), p.204–218. A.34 B. Kaymakçalan, A. Zafer, Langenhop's Inequality and Applications for Dynamic Equations . " Electronic Transactions on Numerical Analysis (ETNA)", 27, (2007), p.7177. A.35 R. Mert, A. Zafer, B. Kaymakçalan, Asymptotic Equivalance of Dynamic Systems on Time Scales. "Discrete and Continuous Dynamical Systems", Supplement, (2007), p.558567. A.36 G. Sh. Guseinov, A. Zafer, Stability Criteria for Linear Periodic Impulsive Hamiltonian Systems . "J.Math. Anal. Applic.", 335, (2007), p.11951206. A.37 A. Özbekler, A. Zafer, Forced Oscillation of SuperHalfLinear Impulsive Differential Equations . " Comput. Math. Appl.", 54, (2007), p.785792. A.38 M.Akhmet, M.A. Tleubergenova, A. Zafer, Asymptotic Equivalance of Differential Equations and Asymptotically Almost Periodic Solutions. "Nonlinear Analysis, TMA", 67, (2007), p.18701877. A.39 R. S. Dahiya, A. Zafer, Oscillation of Higher Order Neutral Type Periodic Differential Equations with Distributed Arguments. "J. Inequalities & Applications", 2007, (2007), p.13. A.40 M. U. Akhmet, J. Alzabut, A. Zafer, On periodic solutions of linear impulsive differential systems. "Dynamics of Continuous, Discrete and Impulsive Systems Series A: Mathematical Analysis,", 15, (2008), p.621631. A.41 G. Sh. Guseinov, A. Zafer, Stability criterion for second order linear impulsive differential equations with periodic coefficients. . "Mathematische Nachrichten", 281, (2008), p.12731282. A.42 A. Zafer, Calculating the matrix exponential of a constant matrix on time scales. "Appl. Math. Lett..", 21, (2008), p.612616. A.43 R. P. Agarwal, A. Zafer, Oscillation Criteria for SecondOrder Forced Dynamic Equations with Mixed Nonlinearities. " Advances in Difference Equations", 2009, (2009), p.20. A.44 D. R. Anderson, A. Zafer, Nonlinear oscillation of secondorder dynamic equations on time scales. "Applied Mathematics Letters", 22, (2009), p.15911597. A.45 F. S. Saryal, A. Zafer, Oscillation of second order nonlinear impulsive deleay differential equations. "Dynamics of Continuous, Discrete and Impulsive Systems Series A: Mathematical Analysis", 16, (2009), p.221231. A.46 A. Zafer, Interval oscillation criteria for second order superhalflinear functional differential equations with delay and advanced arguments. "Mathematische Nachrichten", 282, (2009), p.13341341. A.47 A. Zafer, On oscillation and nonoscillation of second order dynamic equations. "Applied Mathematics Letters", 22, (2009), p.136141. A.48 M.F. Aktas, A. Tiryaki, A. Zafer, Integral criteria for oscillation of third order nonlinear differential equations. "Nonlinear Analysis TMA", 71, (2009), p. e14961502. A.49 A. Ozbekler, A. Zafer, Interval criteria for forced oscillation of superhalflinear differential equations under impulse Effect. "Math. Comput. Modelling", 50, (2009), p.5965. A.50 Agarwal, R.P., Karakoç, F., Zafer, A., A survey on oscillation of impulsive ordinary differential equations. "Advances in Difference Equations", 2010, (2010). A.51 Özbekler, A., Zafer, A., Principal and nonprincipal solutions of impulsive differential equations with applications. "Applied Mathematics and Computation", 216, (2010). A.52 Agarwal, R.P., Anderson, D.R., Zafer, A, Interval oscillation criteria for secondorder forced delay dynamic equations with mixed nonlinearities. "Computers and Mathematics with Applications", 59, (2010), p.977993. A.53 Aktaş, M. F.; Tiryaki, A.; Zafer, A., Oscillation criteria for thirdorder nonlinear functional differential equations. "Applied Mathematics Letters", 23, (2010), p.756762. A.54 Güvenilir, A.F., Şahiner, Y., Zafer, A, Mixed nonlinear oscillation of second order forced dynamic equations. "Dynamic Systems and Applications", 19, (2010), p.635650. A.55 Ozbekler, A., Zafer, A., Leighton–Coles–Wintner Type Oscillation Criteria for HalfLinear Impulsive Differential Equations. "Advances in Dynamical Systems and Applications", 5, (2010), p.205214. A.56 Özbekler, A., Zafer, A., Picone type formula for nonselfadjoint impulsive differential equations with discontinuous solutions. "Electronic Journal of Qualitative Theory of Differential Equations", 2010, (2010), p.112. A.57 Anderson, D.R., Zafer, A, Interval criteria for secondorder superhalflinear functional dynamic equations with delay and advance arguments. "Journal of Difference Equations and Applications", 16, (2010), p.917930. A.58 Ünal, M., Zafer, A, Oscillation of secondorder mixednonlinear delay dynamic equations. "Advances in Difference Equations", 2010, (2010). A.59 Özbekler, A., Zafer, A., Oscillation of solutions of second order mixed nonlinear differential equations under impulsive perturbations. "Computers and Mathematics with Applications", 61, (2011), p.933940. A.60 Zafer, A, Oscillation of secondorder sublinear impulsive differential equations. "Abstract and Applied Analysis", 2011, (2011), p.11. A.61 Özbekler, A., Wong, J.S.W., Zafer, A., Forced oscillation of secondorder nonlinear differential equations with positive and negative coefficients. "Applied Mathematics Letters", 24, (2011), p.12251230. A.62 J. Diblík and A. Zafer, On Stability of Linear Delay Differential Equations under Perron's Condition. "Abstract and Applied Analysis", 2011, (2011), p.9. A.63 Mert, R , Zafer, A., On disconjugacy and stability criteria for discrete Hamiltonian systems. "Computers and Mathematics with Applications", 62, (2011), p.30153026. A.64 Mert, R , Zafer, A., Time scale extensions of a theorem of Wintner on systems with asymptotic equilibrium. "Journal of Difference Equations and Applications", 17, (2011), p.841857. A.65 Şahiner, Y., Zafer, A., Annulus criteria for mixed nonlinear elliptic differential equations. "Mathematical and Computer Modelling", 53, (2011), p.18561864. A.66 M.F. Aktaş, A. Tiryaki, A. Zafer, Oscillation of ThirdOrder Nonlinear Delay Difference Equations. "Turkish Journal of Mathematics", 36, (2012), p.422436. A.67 A. Özbekler, A. Zafer, Secondorder oscillation of mixed nonlinear dynamic equations with several positive and negative coefficients. "Discrete and Continuous Dynamical Systems", S2011, (2012), p.11671175. A.68 T. Ertem, A. Zafer, Existence of solutions for a class of nonlinear boundary value problems on halfline. "Boundary Value Problems", 2012, (2012), p.43. A.69 A. Zafer, Discrete linear Hamiltonian systems: Lyapunov type inequalities, stability and disconjugacy criteria. "Journal of Mathematical Analysis and Applications", 396, (2012). A.70 R. Mert, A. Zafer, A necessary and sufficient condition for oscillation of second order sublinear delay dynamic equations. "Discrete and Continuous Dynamical Systems", S2011, (2012), p.10611067. A.71 S. R. Grace, R. P. Agarwal, and A. Zafer, Oscillation of higher order nonlinear dynamic equations on time scales. "Advances in Difference Equations", 2012, (2012), p.67. A.72 R.P. Agarwal, F. Karakoç, A. Zafer, Oscillation of nonlinear impulsive partial difference equations with continuous variables. "Journal of Difference Equations and Applications", 18, (2012), p.1101–1114. A.73 A. Özbekler, A. Zafer, Nonoscillation and oscillation of secondorder impulsive differential equations with periodic coefficients. "Applied Mathematics Letters 25, 3, March 2012, Pages 294300", 25, (2012), p.294300. A.74 Tiryaki, Aydin; Zafer, Agacik, Global existence and boundedness for a class of secondorder nonlinear differential equations . "APPLIED MATHEMATICS LETTERS", 26, (2013), p.939944. A.75 Sahiner, Y.; Zafer, A., Oscillation of nonlinear elliptic inequalities with p(x)Laplacian . "COMPLEX VARIABLES AND ELLIPTIC EQUATIONS", 58, (2013), p.537546. A.76 T Ertem, A Zafer, Monotone positive solutions for a class of secondorder nonlinear differential equations. "Journal of Computational and Applied Mathematics", 259, (2013), p.672681. A.77 Bohner, M., Zafer, A., Lyapunovtype inequalities for planar linear dynamic Hamiltonian systems . "Applicable Analysis and Discrete Mathematics", 7, (2013). A.78 Ertem, T., Zafer, A., Asymptotic integration of secondorder nonlinear differential equations via principal and nonprincipal solutions . "Applied Mathematics and Computation", 219, (2013), p. 58765886.. A.79 Erbe, L., Mert, R., Peterson, A., Zafer, A., Oscillation of even order nonlinear delay dynamic equations on time scales . "Czechoslovak Mathematical Journal", 63, (2013), p. 265279. A.80 Agacik Zafer, The stability of linear periodic Hamiltonian systems on time scales . "Applied Mathematics Letters", 26, (2013), p.330336. A.81 Grace, Said R.; Graef, John R.; Zafer, Agacik, Oscillation of integrodynamic equations on time scales . " APPLIED MATHEMATICS LETTERS", 26, (2013), p. 383386. A.82 Diblík, J., Braverman, E., Gyori, I., Rogovchenko, Y., Ruzikova, M., Zafer, A., Functional differential and difference equations with applications 2013. "Abstract and Applied Analysis", 2014, (2014), p.1. A.83 Zafer A, Kayar Z, Stability criteria for linear Hamiltonian systems under impulsive perturbations . "Applied Mathematics and Computation", 230, (2014), p. 680–686. A.84 Grace, S.R., Zafer, A., Oscillatory behavior of integrodynamic and integral equations on time scales. "Applied Mathematics Letters", 28, (2014), p.4762. A.85 Zafer A., Ertem T., Monotone positive solutions for a class of secondorder nonlinear differential equations. "Journal of Computational and Applied Mathematics", 259, (2014), p.672681. A.86 S. R. Grace and A. Zafer, Oscillation of fourth order nonlinear neutral delay dynamic equations. "Hacettepe Journal of Mathematics and Statistics", 44, (2015), p.331339. A.87 Ahmad, Bashir; Nieto, Juan J.; O'Regan, Donal; Zafer, Agacik, Recent trends in boundary value problems [Editorial]. "Abstr. Appl. Anal.", 2015, (2015), p.1. A.88 R. P. Agarwal, T. Ertem, A. Zafer, Asymptotic integration of secondorder nonlinear delay differential equations. "Applied Mathematics Letters", 48, (2015), p.128134.
 Conference Papers A.1 A. Zafer, R. S. Dahiya, Oscillation Properties of Solutions of Arbitrary Order Neutral Differential Equations. "Proc. of the Third Int. Conf. on Differential Equaations", (1993), p.205217. A.2 A. Zafer, R.S. Dahiya, Oscillation of Solutions of Arbitrary order Neutral Functional Differential Equations with Forcing Terms. "Proc. of the First World Congress of Nonlinear Analysts", 2, (1996), p.19771987. A.3 A. Zafer, Oscillation of Higher Order Neutral Type Difference Equations. "Proc.of the Second Int. Conf. on Difference Equations and Applications", (1997), p.641647. A.4 S. A. Özgün, A. Zafer, B. Kaymakçalan, Gronwall and Bihari Type Inequalities on Time Scales. "Proc. of the Second Int. Conf. on Difference Equations and Application", (1997), p.481490. A.5 M. U. Akhmet, J. Alzabut, A. Zafer, On Functionally Equivalent Impulsive Delay Differential Equations. "Proceedings of Dynamical Systems and Applications", (2004), p.4855. A.6 Agacik Zafer, Billur Kaymakcalan, Asymptotic equivalence of dynamic equations.. "JANUARY 2005 NOTICES OF THE AMS 123", 1003, (2005), p.1497). A.7 Agacik Zafer, Billur Kaymakcalan, Langenhop’s Inequality and Applications for Dynamic Equations. "MARCH 2005 NOTICES OF THE AMS Special Session on Dynamic Equations on Time Scales and Applications,", 1004, (2005), p.183. A.8 Agacik Zafer, Billur Kaymakcalan, Langenhop's Inequality and Applications for Dynamic Equations. "The Sixth Mississippi State  UAB Conference on Differential Equations & Computational Simulations,", (2005). A.9 R.S. Dahiya and A. Zafer, Oscillation of higherorder neutral type functional differential equations with distributed arguments.. "Proceedings of the Conference on Differential & Difference Equations and Applications", (2006), p.315–324. A.10 R. Mert, A. Zafer, Time Scale Extension of Wintner's Theorems on Asymptotic Equilibrium. "ISAAC", (2007). A.11 A. Zafer, Interval Oscillation of SuperHalfLinear Functional Differential Equations. "ISAAC", (2007). A.12 Ağacık Zafer, Interval criteria for superhalflinear dynamic equations on time scales. "14. International conference on difference equations and applications", (2008). A.13 Raziye Mert, Ağacık Zafer, Oscillation of superliner second order dynamic equations. "International Workshop on New Trends in Science and Technology", (2008). A.14 Ağacık Zafer, Calculating the matrix exponential on time scales. "Workshop on dynamic equations and applications", (2008). A.15 Raziye Mert, Ağacık Zafer, Time scale extension of a theorem of Winter on asymptotic equilibrium. "14. International conference on difference equations and applications", (2008). A.16 A. Zafer, Stability of linear systems of dynamic equations. " EquaDiff12", (2009). A.17 A. Zafer, Interval criteria for functional differential equations with delay and advanced arguments. "III Congress of the Turkish World Mathematicians", (2009). A.18 A. Zafer, Interval criteria for dynamic equations with mixed nonlinearities. "The 7th ISAAC congress", (2009). A.19 R. Mert, A. Zafer, Eventually positive solutions of secondorder superlinear dynamic equations. "Further progress in analysis: Proceedings of the 6th International ISAAC Congress", (2009), p.535544. A.20 Zafer, A, Perron type stability criteria for linear dynamic systems. "Progress on difference equations (PODE)", (2010), p.3. A.21 Zafer,A, Stability of linear Hamiltonian systems under impulse effect. "The 6th International Conference: Dynamical Systems and Applications", (2010). A.22 Kayar Z, Zafer, A, Lyapunov type inequalities for impulsive systems. "International Conference on Differential & Difference Equations and Applications", (2011). A.23 Ertem T, Zafer A, Asymptotic integration of second order nonlinear differential equations. "8th International ISAAC Congress", (2011). A.24 Zafer, A, Discrete Hamiltonian Systems: Lyapunov type inequalities and stability criteria. "International Conference on Differential & Difference Equations and Applications", (2011). A.25 Zafer, A, Oscillation of second order functional differential equations. "8th International ISAAC Congress", (2011). A.26 Sahiner Y, Zafer A, Annulus oscillation criteria for partial differential equations. "8th International ISAAC Congress", (2011). A.27 A. Zafer, Asymptotic integration of secondorder differential equations on time scales. "The International Conference on the Theory, Methods and Applications of Nonlinear Equations", (2012). A.28 A. Zafer, On oscillation of Volterra integrodifferential and integral equations on time scales. "The International Conference on the Theory, Methods and Applications of Nonlinear Equations", (2012). A.29 S.R. Grace, R.P. Agarwal, P.J.Y. Wong, A. Zafer, On the oscillation of fractional differential equations Grace, Said R.; Agarwal, Ravi P.; Wong, Patricia J.Y.; Zafer, Ağacık . "Fractional Calculus and Applied Analysis", 15, (2012), p.222231. A.30 A. Zafer, Perron type stability theorems for linear functional differential equations with variable delay. "Functional Analysis and its Applications", (2012). A.31 A. Zafer, Discrete Hamiltonian Systems: Stability and Disconjugacy. "The 11th International Workshop on Dynamical Systems and Applications", (2012). A.32 A. Zafer, Stability of linear periodic Hamiltonian systems on time scales. "9th ISAAC Congress", (2013). A.33 Sibel Doğru Akgöl and Ağacık Zafer, Existence of Principal and Nonprincipal Solutions for Impulsive Differential Equations with Discontinuous Solutions. "14th International Workshop on Dynamical Systems and Applications (IWDSA 2015)", (2015), p.4. A.34 Sibel Doğru Akgöl and Ağacık Zafer, ASYMPTOTIC REPRESENTATION OF THE SOLUTIONS FOR A SECOND ORDER NONLINEAR IMPULSIVE DIFFERENTIAL EQUATION. "International Conference on Differential & Difference Equations and Applications 2015", (2015), p.79. A.35 Ağacık Zafer, ASYMPTOTIC INTEGRATION OF NONLINEAR DIFFERENTIAL EQUATIONS. "International Conference on Dierential & Dierence Equations and Applications 2015", (2015), p.57. A.36 Sibel Doğru Akgöl and Ağacık Zafer, A General Result On Asymptotic Integration of Impulsive Differential Equations. "International Conference on Pure and Applied Mathematics (ICPAM 2015)", (2015). A.37 A. Zafer, Halanay type stability theorems for delay dynamic equations. "The 4th Abu Dhabi University Annual International Conference: Mathematical Science and its Applic.", (2015).

Book and Chapter in a Book A.1 A. Özbekler and A. Zafer, Forced Oscillation of SecondOrder Impulsive Differential Equations with Mixed Nonlinearities. "Differential and Difference Equations with Applications,", 47, (2013), p.183195. A.2 M. Ünal and A. Zafer, Prescribed asymptotic behavior for nonlinear secondorder dynamic equations,. "Spectral Analysis, Differential Equations and Mathematical Physics: A Festschrift in Honor of Fritz", 87, (2013), p.365376.

