1. M.O.R.E. to M.E.O.R.: An overview of microbially enchanced recovery;Jack,1993
2. Chemical markers of induced microbial transformations in crude oils;Premuzic,1993
3. Microbial Transformations of Low Rank Coals,1993
4. Biodegradation of coals;Lin;Fuel,1993
5. Petroleum Geochemistry and Geology;Hunt,1979