Wigier, Marek. “Time and Space in Long-Term Development of Agriculture and Rural Areas - a Retrospective Approach”. Journal of Agribusiness and Rural Development 24, no. 2 (December 31, 2012): 263-272. Accessed February 7, 2025. http://www1.up.poznan.pl/jard/index.php/jard/article/view/539.