B. Čagran, L. Sadek, and M. Ivanuš Grmek, “Eksperimentalno preverjanje učinkov projektnega pouka pri predmetu spoznavanje okolja”, REI, vol. 4, no. 1/2, pp. 5–22, Apr. 2011, Accessed: Aug. 22, 2026. Available: https://journals.um.si/index.php/education/article/view/310