1. Attitudes of European farmers towards GM crop adoption;Areal;Plant Biotechnology Journal,2011
2. Kwantitatieve Informatie Veehouderij 2008–2009;ASG,2008
3. Spatial dimension of externalities and the Coase Theorem: implications for coexistence of transgenic crops;Beckmann,2007
4. Coexistence rules and regulations in the European Union;Beckmann;American Journal of Agricultural Economics,2006
5. Coexistence of genetically modified (GM) and non-modified (non GM) crops: are the two main property rights regimes equivalent with respect to the coexistence value?;Beckmann,2011