1. Monsanto, Biotechnology Pipeline, Presentation by Purcell, J.P., St. Louis, MO, August 6, 2004.
2. S. Peltzman. Regulation of pharmaceutical innovation. American Enterprise Institute, 1974.
3. The political economy of agricultural biotechnology policies;Graff;AgBioForum,2009
4. The contraction of agbiotech product quality innovation;Graff;Nature Biotechnology,2009
5. Compliance costs for regulatory approval of new biotech crops;Kalaitzandonakas;Nature Biotechnology,2007