ZWOLAK, Jan. Fixed assets productivity dynamics and their investment Input in polish agriculture, forestry, fishery and hunting Within 1999-2002. Annals of Agricultural Economics and Rural Development, [S. l.], v. 92, n. 2, p. 29–34, 2006. DOI: 10.22630/RNR.2006.92.2.20. Disponível em: https://rnr.sggw.edu.pl/article/view/8775. Acesso em: 11 nov. 2026.