CI Cygni - the Well Understood Symbiotic Binary?
The Symbiotic Phenomenon, Proceedings of IAU Colloq. 103, held in Torun, Poland, 18-20 August, 1987. Edited by Joanna Mikolajewska, Michael Friedjung, Scott J. Kenyon, and Roberto Viotti. Dordrecht, Kluwer Academic Publishers (Astrophysics and Space Science Library. Volume 145), 1988., p.187
The observed properties of CI Cyg are reviewed. Spectroscopic and photometric changes due to orbital effects as well as intrinsic variability of the components are discussed.