Mikailov Khidir Mustafa, Mammadov Ruslan Tavakkul, Rustamov Bayram Nizam, & Rustamova Aysel Bayram. (2023). Spectral Variability of the Symbiotic Star CH Cyg. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, 60(1), 9–13. https://doi.org/10.53560/PPASA(60-1)671