| A.1 Karacan, Ö. and Okandan, E., Assessment of Energetic Heterogeneity of Coals for Gas Adsorption and Its Effect on Mixture Predictions for Coal Bed Methane Studies. "Journal of Fuel", 79, (2000), p.1963-1974.|
A.2 Karacan, Ö. and Okandan, E., Fracture/cleat Analysis of Coals from Zonguldak Basin (Northwestern Turkey) relative to the Potential of Coal Bed Methane Production. "International Journal of Coal Geology", 44, (2000), p.109-125.
A.3 Karacan, Ö. and Okandan, E., Adsorption and Gas Transport in Coal Microstructure:Investigation and Evaluation by Quantitative X-Ray CT Imaging. "Fuel", 80, (2001), p.509-520.
A.4 Demiral, B., Gümrah, F. and Okandan, E., Reservoir Description and Development of a Mature Oil Field. "Energy Sources", 23, (2001), p.165-175.
A.5 Okandan, E., Gümrah, F. and Demiral, B., Pollution of an Aquifer by Produced Oil Field Waters. "Energy Sources", 23, (2001), p.327-336.
A.6 Ozlem T.Bayrak, Ender Okandan,Hale Üçkardeş, Inter-laboratory comparison scheme for fuel sector, LABKAR in Turkey. "Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical", 14, (2009), p.497-502.
| A.1 Akın, S. and Okandan, E., Geothermal Reservoir Characterization by Tracer Testing and Well Testing. "Geothermal Resources Council", (1997).|
A.2 Karacan, Ö. and Okandan, E., Kömür Örneklerinde Metan Drenajının Karot Tomografi Sistemi ile İncelenmesi. "12th International Petroleum Congress and Exhibition of Turkey", (1998).
A.3 Okandan, E., Gümrah, F., Demiral, B., Parlaktuna, M., (6), Assessment of Pollution Caused by Injection of Oil Field Waters in a Fresh Water Aquifer. "12th International Petroleum Congress and Exhibition", (1998), p.512.
A.4 Karacan, Ö. and Okandan, E., Heterogeneity Effects on the Storage and Production of Coal Seams. "SPE Annual Technical Conference and Exhibition", (1999).
A.5 Okandan, E. and Karacan, Ö., Identification and Use of Biomarkers for Assessing Oil Pollution in a Groundwater Aquifer and in a Lake. "19th International Meeting on Organic Geochemistry", (1999).
A.6 Demrial, B., Gümrah, F. and Okandan, E., Production Development for a Mature Oil Field. "Canadian International Petroleum Conference, 52nd Annual Technical Meeting", (2001).
A.7 Okandan, E. and Özcan, B., Impact of Oil Field Activities on Water Resources. "NATO, ARW on Risk Assesment as a Tool for Water Resources Decision Making in Central Asia", (2002).
A.8 Gümrah, F., Okandan, E. and Özkale, A., Characterisation of Naturally Occuring Radioactive Materials in Oil and Gas Fields. "", (2002), p.74.
A.9 Birol Demiral, Fevzi Gümrah, Ender Okandan, Tracking of Three Phase Fluid Saturation by Computerized Tomography During Steam-CO2 Processes. "Canadian International Petroleum Conference, 54th Annual Meeting", (2003), p.CD.
A.10 Chantsalmaa Dalha, Ender Okandan, Sayindere cap rock integrity during possible CO2 sequestration in Turkey . "EAGE 2010", (2010).
Book and Chapter in a Book
| A.1 Okandan, E., Low Temperature Geothermal Reservoir Engineering. "IGA-European Branch", (1997).|
| A.1 Ender Okandan,Sevilay Çiçek,Çağlar Sınayuç, Tüketiciye ulaşan akaryakıtta kalite. "Türkiye 9. Enerji Kongresi", 1, (2003), s.223-233.|
A.2 PARLAKTUNA, M., GÜLEÇ, N., KARAHANOĞLU, N., OKANDAN, E./, DENİZLİ-KIZILDERE JEOTERMAL SAHASI ELEKTRİK ENERJİSİ ÜRETİM POTANSİYELİ ÜZERİNE BİR ÇALIŞMA. "TMMOB Jeotermal Kongresi", (2007).
A.3 PARLAKTUNA, M., GÜLEÇ, N., KARAHANOĞLU, N., OKANDAN, E./, DENİZLİ-KIZILDERE JEOTERMAL SAHASI ELEKTRİK ENERJİSİ ÜRETİM POTANSİYELİ ÜZERİNE BİR ÇALIŞMA. "TMMOB Jeotermal Kongresi", (2007).