1. Effect of viscosity on the biodegradability of automotive lubricating oils;Amund;Tribol. Int.,1991
2. ASTM, 2001a. Standard test method for trace nitrogen in liquid petroleum hydrocarbons by syring/inlet oxidative combustion and chemiluminescence detection, test method D4629-96. ASTM Subcommittee D02.03.0B, Book of Standards vol. no. 05.02. American Society for Testing and Materials, West Conshohocken, PA
3. ASTM, 2001b. Standard test method for nitrogen in petroleum and petroleum products bu boat-inlet chemiluminescence, test method D5762-01. ASTM Subcommittee D02.03, Book of Standards vol. no. 05.03. American Society for Testing and Materials, West Conshohocken, PA
4. ASTM, 2001c. Standard test methods for aniline point and mixed aniline point of petroleum products and hydrocarbon solvents, test method D611-01. ASTM Subcommittee D02.04.0D, Book of Standards vol. no. 05.01. American Society for Testing and Materials, West Conshohocken, PA
5. Bioremediation of petroleum pollutants;Atlas;Bioscience,1995