ÜLEN, Simon in GERLIČ, Ivan, 2012, The conceptual learning of physics in Slovenian secondary schools. Education in information society [na spletu]. 2012. Vol. 45, no. 3, p. 140–144. [Dostopano 4 april 2025]. DOI 10.2478/v10051-012-0015-3. Pridobljeno s: https://dk.um.si/IzpisGradiva.php?lang=slv&id=52177