АКСЬОНОВ, О. The ecological balance of the environment. Proceedings of National Aviation University, [S. l.], v. 33, n. 3-4, p. 138–141, 2007. DOI: 10.18372/2306-1472.33.1513. Disponível em: https://jrnl.nau.edu.ua/index.php/visnik/article/view/1513. Acesso em: 7 may. 2024.