SHÁŇAL, L.; PORTEŠ, P. UNIVERSAL TOOL FOR DATA ANALYSIS. Perner’s Contacts, [S. l.], v. 11, n. 4, p. 136–143, 2016. Disponível em: https://pernerscontacts.upce.cz/index.php/perner/article/view/581. Acesso em: 4 kvě. 2024.