OGIENKO, O.; TERENKO, O. Non-Formal Adult Education: Challenges and Prospectsof 21st Century. Journal of Education, Technology and Computer Science, [S. l.], v. 24, n. 2, p. 169–174, 2018. DOI: 10.15584/eti.2018.2.22. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/5908. Acesso em: 21 lis. 2024.