@ARTICLE {GOCKOWSKI:2013, title = {Improving the productivity and income of Ghanaian cocoa farmers while maintaining environmental services: what role for certification?}, author = {Gockowski, J. and Afari-Sefa, V. and Sarpong, D. B. * and Osei-Asare, Y. B. * and Agyeman, N. F. *}, journal = {International Journal of Agricultural Sustainability}, year = {2013}, pages = {1--18}, issn = {1473-5903}, note = {Online First. Routledge;Taylor and Francis}, url = {http://dx.doi.org/10.1080/14735903.2013.772714}, doi = {10.1080/14735903.2013.772714}, }