SIEVERS, Georg. Sustainability in Corporate Practice Certification Based on Din and Iso. European Journal of Economics and Business Studies, [S. l.], v. 7, n. 2, p. 12–25, 2021. DOI: 10.26417/411vgz16b. Disponível em: https://revistia.com/index.php/ejes/article/view/2770. Acesso em: 2 nov. 2025.