WALAT, W.; LIB, W. Wprowadzenie. Journal of Education, Technology and Computer Science, ISSN 2719-6550, e-ISSN 2719-7417, [S. l.], v. 13, n. 3, p. 9–10, 2015. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6429. Acesso em: 23 sie. 2026.