Shlyapnikov, Aleksei, Maksim Gorbunov, Gоrbachev Mark, and Ruslan Akmetdinov. “Archives of CrAO Spectral Observations. Catalogues of Objects and Images”. Acta Astrophysica Taurica 1, no. 1 (April 15, 2020): 23–29. Accessed May 6, 2024. https://astrophysicatauricum.org/index.php/aat/article/view/7.