1. Abubakar MB, Dike EFC, Obaje NG, Wehner H, Jauro A (2008) Petroleum prospectivity of Cretaceous formations in the Gongola Basin, Upper Benue Trough, Nigeria: an organic geochemical perspective on a migrated oil controversy. J Pet Geol 31(4):387–408
2. Agagu OK, Ekweozor CM (1982) Source-Rock Characteristics of Senonian Shales in the Anambra Syncline, Nigeria. J Min Geol 19(1):132–140
3. Agagu OK, Fayose EA, Petters SW (1985) Stratigraphy and sedimentation in the Senonian Anambra Basin of Eastern Nigeria. J Min Geol 22:25–36
4. Akande SO, Ogunmoyero IB, Petersen HI, Nytoft HP (2007) Source rock evaluation of coals from lower Maastrichtian Mamu Formation, S.E., Nigeria. J Pet Geol 30(4):303–324
5. Anyiam OA, Onuoha KM (2013) A study of hydrocarbon generation and expulsion of the Nkporo Shales in Anambra Basin, Nigeria. Arab J Geosci. doi: 10.1007/s12517-013-1064-5