ZELLEI, Anett. Remaining Challenges. Ökologisches Wirtschaften - Fachzeitschrift, [S. l.], v. 18, n. 1, 2003. DOI: 10.14512/oew.v18i1.226. Disponível em: https://oekologisches-wirtschaften.de/index.php/oew/article/view/226. Acesso em: 3 mai. 2024.