Brajković, Rok, Mojca Bedjanič, Neža Malenšek Andolšek, Nina Rman, Matevž Novak, Kaja Šušmelj, and Petra Žvab Rožič. 2018. “Systematic Overview of Geological Learning Objectives and Textbook Contents for Primary Schools and Gymnasiums”. Geologija 61 (2):239-52. https://doi.org/10.5474/geologija.2018.017.