HORVÁTH CZ., János. Stackability planning in informal learning and soft skill acknowledgments. Opus et Educatio, [S. l.], v. 12, n. 1, 2025. 10.3311/ope.40560. Disponível em: https://journals.bme.hu/oee/article/view/40560. Acesso em: 6 jul. 2025.