ANDREEVA, Olga; ABRAMENKO, Valentina; MALASHCHUK, Valentina. Cyclic variations in the areas of coronal holes and sunspots in 2010–2021. Acta Astrophysica Taurica, [S. l.], v. 5, n. 3, p. 14–17, 2024. Disponível em: https://astrophysicatauricum.org/index.php/aat/article/view/87. Acesso em: 22 mar. 2026.