SYED ZAIN, S. F.; AHMAD, N.; ZAINUDDIN, M. Z. Helium λ 4009.27 Ã… Phase Variation in Alpha Virginis. Malaysian Journal of Science, [S. l.], v. 26, n. 2, p. 143–149, 2007. Disponível em: https://adum.um.edu.my/index.php/MJS/article/view/8082. Acesso em: 23 dec. 2024.