Bereżnicka, Joanna, and Ludwik. “Convergence of Economic Efficiency in Farms in the Wielkopolska Region”. Rozwój Regionalny i Polityka Regionalna, no. 66 (December 20, 2023): 43–60. Accessed July 17, 2024. https://pressto.amu.edu.pl/index.php/rrpr/article/view/42205.