KROTKÝ, J.; KARPÍŠKOVÁ, P.; KRÁL, J. The Use of Non-System Components of Construction Sets. Journal of Education, Technology and Computer Science, [S. l.], v. 21, n. 3, p. 74–81, 2017. DOI: 10.15584/eti.2017.3.9. Disponível em: https://journals.ur.edu.pl/jetacomps/article/view/6053. Acesso em: 22 lis. 2024.