KLEMENT, M. Polytechnic Education and Its Possible Use at Non-Technical Secondary School. Journal of Education, Technology and Computer Science, ISSN 2719-6550, e-ISSN 2719-7417, [S. l.], v. 22, n. 4, p. 227–235, 2017. DOI: 10.15584/eti.2017.4.29. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6016. Acesso em: 23 sie. 2026.