1. Al-Shahristani, H. and Al-Atyia, M.J. (1972) Vertical migration of oil in Iraqi oil fields: Evidence based on vanadium and nickel concentrations. Geochim. Cosmochim. Acta., v.36, pp.929–938.
2. Bowen, H.J.M. (1979) The Environmental Chemistry of the Elements. Academic Press, London, New York.
3. Clark, J.R., Reno, N.V. and Tompkins, R. (2003) Mapping of reservoirs and subsurface structures using selective analysis of the surface chemistry of soil particles. 88th Annual Meeting of AAPG (Extended Abstract), Salt Lake City, May 11-14.
4. Donovan, T.J. (1974) Petroleum microseepage at Cement, Oklahoma Evidence and mechanisms. AAPG Bull., v.58, pp.429–446.
5. Kundu, J. and Wani, M.R. (1992) Structural style and tectono stratigraphic framework of Cambay rift basin, Western India: Indian Jour. Petroleum Geol., v.86(11), pp.1891–1919.