Borowy, M., and J. Sawicka. “MEASURES SUPPORTING CULTURAL AND NATURAL LANDSCAPE PROTECTION IN POLAND ON THE EXAMPLE OF THE PILOT PROGRAM LEADER+”. Acta Scientiarum Polonorum. Oeconomia, vol. 6, no. 1, Mar. 2007, pp. 5-14, https://aspe.sggw.edu.pl/article/view/900.