1. American Society of Testing Materials (ASTM), D-388 (reapproved 1971), Standard Classification of coal by rank. American Society of Testing Materials, Philadelphia, Pa.
2. American Society of Testing Materials (ASTM), D-2797 (reapproved 1980). Preparing coal samples for microscopical analysis by reflected light. American Society of Testing Materials, Philadelphia, Pa.
3. The Tyrrhenian and Pannonian Basins: a comparison of two Mediterranean interarc basins;Boccaletti;Tectonophysics,1976
4. Evolution des substances carbonées naturelles. Formation de graphite;Bonijoly Roussel,1980
5. Gradients of vitrinite reflectance and present temperatures in the Los Angeles and Ventura Basins, California;Bostick,1979