ČAGRAN, Branka; SADEK, Lidija; IVANUŠ GRMEK, Milena. Eksperimentalno preverjanje učinkov projektnega pouka pri predmetu spoznavanje okolja. Journal of Elementary Education, [S. l.], v. 4, n. 1/2, p. 5–22, 2011. Disponível em: https://journals.um.si/index.php/education/article/view/310. Acesso em: 6 dec. 2025.