PAPADIMITRIOU, S. T.; NIARI, M. I. Open Badges as Credentials in Open Education Systems: Case Studies from Greece and Europe. Journal of Learning for Development , [S. l.], v. 6, n. 1, 2019. DOI: 10.56059/jl4d.v6i1.311. Disponível em: https://jl4d.org/index.php/ejl4d/article/view/311. Acesso em: 25 apr. 2024.