SHTERTSER, N.; TSAP, Y.; AKHTEMOV, Z. On the quality of sunspot images from observations at the STT-2 of CrAO. Acta Astrophysica Taurica, [S. l.], v. 6, n. 1, p. 31–34, 2025. Disponível em: https://astrophysicatauricum.org/index.php/aat/article/view/107. Acesso em: 31 mar. 2025.