Letter from United Nations. Sustainability in Debate, [S. l.], v. 1, n. 2, p. 15, 2010. DOI: 10.18472/SustDeb.v1n2.2010.1674. Disponível em: https://periodicostestes.bce.unb.br/index.php/sust/article/view/14993. Acesso em: 7 apr. 2025.