10. Arthur D. Litmited, 2001, MTBE and the Requirements for Underground Storage Tank Construction and Operation in Member State. Report to the European Commission, March 2001, Ref. ENV.D.I/ETU/2000/0089R
11. US EPA (United States Environmental Protection Agency), 2005, Underground Storage Tank. http://www.epa.gov/swerust1/overview.htm
12. US EPA/OUST (US EPA/Office of Underground Storage Tanks), 2005, Cleaning Up Leaks from Underground Storage Tanks. EPA 510-F-05-001, US EPA Press. Washington, USA