Багина E. . Двойная звезда . проект байкал, Irkutsk, Russian Federation, v. 18, n. 68, p. 50–55, 2021. DOI: 10.51461/projectbaikal.68.1802. Disponível em: https://projectbaikal.com/index.php/pb/article/view/1802. Acesso em: 9 дек. 2022.