Činčera, Jan, Petr Gilar, and Júlia Sokolovičová. “A Professional Development Course for School Coordinators of Environmental Education: Interpretation and Effectiveness from the Point of View of Its Alumni”. Envigogika 5, no. 1 (May 13, 2010). Accessed September 17, 2021. https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/47.