WICKI, Ludwik. The level of use of biological progress in plant production in Poland and its spatial differentiation. Annals of Agricultural Economics and Rural Development, [S. l.], v. 97, n. 4, p. 221–229, 2010. DOI: 10.22630/RNR.2010.97.4.79. Disponível em: https://rnr.sggw.edu.pl/article/view/9061. Acesso em: 10 nov. 2026.