DLOUHÁ, J.; PETIŠKA, E.; DLOUHÝ, J.; KAPITULČINOVÁ, D. Opportunities and Risks of the Use of Open Education Resources in Environmental Disciplines at University Level in the Czech Republic: A Criteria for Assessing Quality. Envigogika, Praha, Czech Republic, v. 10, n. 4, 2015. DOI: 10.14712/18023061.503. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/503. Acesso em: 23 jan. 2021.