HUS, Vlasta, IVANUŠ-GRMEK, Milena in ČAGRAN, Branka, 2008, The teachers’ opinions on the integration of the subject environmental studies with other subjects. V : [na spletu]. Objavljeni povzetek znanstvenega prispevka na konferenci. 2008. [Dostopano 23 april 2025]. Pridobljeno s: http://www.eera-ecer.eu/publication-database/conference/2008/contribution/the_teachers_opinions_on_the_integration_of_the_subject_environmental_studies_with_other_subjects/