Ďuriš, Milan, Viera Tomková, und Petra Kvasnová. „Experiments to Verify the Properties of Technical Materials in the Subject of Technology in Lower Secondary Education“. R&E-SOURCE 1, no. s1 (März 5, 2024): 61–68. Zugegriffen Mai 19, 2024. https://journal.ph-noe.ac.at/index.php/resource/article/view/1241.