BARTNICZAK, Bartosz. Agricultural land protection fund and forest fund as ecological funds. Equilibrium. Quarterly Journal of Economics and Economic Policy, Olsztyn, v. 3, n. 2, p. 89–97, 2009. DOI: 10.12775/EQUIL.2009.023. Disponível em: https://economic-policy.pl/index.php/eq/article/view/550. Acesso em: 22 jan. 2026.