The issue of distance education in the Slovak Republic. R&E-SOURCE, [S. l.], v. 1, n. 1, 2018. DOI: 10.53349/re-source.2018.i1.a630. Disponível em: https://journal.ph-noe.ac.at/index.php/resource/article/view/630. Acesso em: 7 oct. 2025.