“The luminosities of the binary Cepheids SU Cyg, SU Cas and W Sgr”., RMxAA, vol. 14, no. 1, p. 435, Jan. 1987, Accessed: Dec. 09, 2025. [Online]. Available: https://astronomia.unam.mx/journals/rmxaa/article/view/1987rmxaa..14..435e