1. Agbios (2007) GM Crop Database. Agbios, Ontario, Canada 2007.
2. Alexander C. (2006) Framer decisions to adopt genetically modified corps. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources 1, N. 045, 9 p., DOI: 10.1079/PAVSNNR20061045.
3. ASA (American Soybean Association) (2001) Conservation Tillage Study, Saint-Louis (MO), Nov. 2001, 22p.
4. Ash M. (2001) Soybeans: Background and Issues for Farm Legislation, USDA-ERS report No. OSC-0701-01, July 2001, 9 p.
5. Aspelin A., Grube A.H. (1999) Pesticides Industry Sales and Usage: 1996 and 1997 Market Estimates, USEPA, Washington, Nov. 1999.