Feasibility of isolation perimeters for genetically modified maize Yann Devos, Olivier Thas, Mathias Cougnon, Eva M. De Clercq, Karl Cordemans and Dirk Reheul Agron. Sustain. Dev., 28 2 (2008) 195-206 Published online: 20 October 2007 DOI: 10.1051/agro:2007039