Tajmiri, M., Mousavi, S.M., Ehsani, M.R., Roayaei, E., Emadi, A., “Wettability Alteration of Sandstone and Carbonate Rocks by Using ZnO Nanoparticles in Heavy Oil Reservoirs”, Iranian Journal of Oil & Gas Science and Technology, Vol. 4(4), 2015, 50-66.