Coexistence of genetically modified (GM) and non-GM crops in the European Union. A review Yann Devos, Matty Demont, Koen Dillen, Dirk Reheul, Matthias Kaiser and Olivier SanvidoAgron. Sustain. Dev., 29 1 (2009) 11-30DOI: https://doi.org/10.1051/agro:2008051