Brajković, R., Bedjanič, M., Malenšek Andolšek, N., Rman, N., Novak, M., Šušmelj, K. and Žvab Rožič, P. (2018) “Systematic overview of geological learning objectives and textbook contents for primary schools and gymnasiums”, Geologija, 61(2), pp. 239–252. doi: 10.5474/geologija.2018.017.