PAWLAK, Jan. EFFICIENCY OF ENERGY INPUTS IN POLISH AGRICULTURE. Annals of Agricultural Economics and Rural Development, [S. l.], v. 99, n. 1, p. 121–128, 2012. DOI: 10.22630/RNR.2012.99.1.12. Disponível em: https://rnr.sggw.edu.pl/article/view/9128. Acesso em: 10 nov. 2026.