PAVELKA, J.; ŠOLTÉS, J. Metodické materiály Centra edukácie a popularizácie techniky. Journal of Education, Technology and Computer Science, [S. l.], v. 21, n. 3, p. 59–66, 2017. DOI: 10.15584/eti.2017.3.7. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6051. Acesso em: 23 lis. 2024.