1. Transformation of Petroleum in Nature;Andrew,1968
2. Pendleton-Many-Ft. Jesup field, Sabine Parish, Louisiana;Cameron,1963
3. Organic geochemistry of Venezuelan extra-heavy oils;Cassani;Chem. Geology,1986
4. Sedimentology and genetic stratigraphy of Dean and Spraberry formations (Permian), Midland Basin, Texas;Handford;Amer. Assoc. Petrol. Geol. Bull.,1981