DEMIANENKO, V. Ontological principles of formalization of information sources in e-educational environments. ScienceRise: Pedagogical Education, [S. l.], n. 6 (33), p. 39–45, 2019. DOI: 10.15587/2519-4984.2019.186200. Disponível em: https://journals.uran.ua/sr_edu/article/view/186200. Acesso em: 4 may. 2024.