GÁL, Z. The possibilities of companies how to reduce their emmisions. Economica, [S. l.], v. 7, n. 3, p. 61–68, 2020. DOI: 10.47282/ECONOMICA/2014/7/3/4382. Disponível em: https://ojs.lib.unideb.hu/economica/article/view/4382. Acesso em: 17 apr. 2021.