Karitskaya, E.A., N.G. Bochkarev, A.V. Bondar, G.A. Galazutdinov, F.A. Musaev, A.A. Sapar, V.V. Shimanskii, M.I. Agafonov, и O.I. Sharova. 2007. «The High-Resolution Optical Spectroscopy As a Method of X-Ray Binary CYG X-1 Investigation. The Results of CYG X-1 Monitoring During 2002-2004». Известия Крымской астрофизической обсерватории 103 (3):152-52. https://jncrao.ru/index.php/izvcrao/article/view/252.