СЕРЕГИН, Е. The current state of development of the theory himmotologii. Proceedings of National Aviation University, [S. l.], v. 38, n. 1, p. 89–94, 2009. DOI: 10.18372/2306-1472.38.1669. Disponível em: https://jrnl.nau.edu.ua/index.php/visnik/article/view/1669. Acesso em: 18 may. 2024.