MURAD, Ismail Musa; ABABAKR, Karim Mahmood. Spot Activity of AK Her Binary Star. Al-Nahrain Journal of Science, [S. l.], v. 15, n. 1, p. 46–54, 2012. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/1545. Acesso em: 22 may. 2026.