Mikailov Khidir Mustafa, Mammadov Ruslan Tavakkul, Rustamov Bayram Nizam, Rustamova Aysel Bayram. Spectral Variability of the Symbiotic Star CH Cyg. PPASA [Internet]. 2023 Mar. 15 [cited 2026 Mar. 7];60(1):9-13. Available from: http://www.ppaspk.org/index.php/PPAS-A/article/view/806