Hadyńska, A., and J. Hadyński. “The Implementation of Agri-Environmental Policy Incentives Within Common Agricultural Policy - United Kingdom’s Case of Study”. Journal of Agribusiness and Rural Development, Vol. 3, no. 359, Dec. 2004, pp. 47-56, http://www1.up.poznan.pl/jard/index.php/jard/article/view/1015.