BALLA, Z. The use of renewable resources is an opportunity and an obligation. Acta Agraria Debreceniensis, [S. l.], n. 55, p. 13–17, 2014. DOI: 10.34101/actaagrar/55/1902. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/1902. Acesso em: 14 aug. 2022.