SANDNER, J. Selected aspects of research methodology of a holistic educational environment in the light of the idea of sustainable development. Studia Ecologiae et Bioethicae, [S. l.], v. 7, n. 1, p. 183–202, 2009. DOI: 10.21697/seb.2009.7.1.12. Disponível em: https://czasopisma.uksw.edu.pl/index.php/seb/article/view/7336. Acesso em: 5 jul. 2024.