Anželj, Gregor, Janez Brank, Andrej Brodnik, Luka Fürst, and Matija Lokar. Slikovno Programiranje: E-Učbenik Za Uvod V Programiranje. University of Maribor Press, 2018. Accessed October 17, 2026. https://press.um.si/index.php/ump/catalog/book/366.