1. Glyphosate: A once-in-a-century herbicide;Duke;Pest Manag Sci,2008
2. United States Geological Survey https://water.usgs.gov/nawqa/pnsp/usage/maps/show_map.php?year=1994&map=GLYPHOSATE&hilo=L 2016
3. James C Global Status of Commercialized Biotech/GM Crops: 2016 2016
4. Economic impact of GM crops: The global income and production effects 1996-2012;Brookes;GM Crops Food Biotechnol Agric Food Chain,2014
5. Economic benefits of genetically-modified herbicide-tolerant canola for producers;Gusta;AgBioForum,2011