Hynek, Alois, Břetislav Svozil, Jan Trávníček, and Jakub Trojan. “Sustainable Deblín Region: Educational Project”. Envigogika 4, no. 2 (September 30, 2009). Accessed October 13, 2019. https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/40.