1. Ambartsumian V. A., 1947, The evolution of stars and astrophysics
2. Ambartsumian V. A., 1955, Some Remarks on Multiple Galaxies, Nekotorye Zameˇcaniˆa o Kratnyh Galaktikah. Soobˇsenie na simpoziume
3. Meˇzdunarodnogo Astronomiˇceskogo Soˆuza v Dubline. Some Remarks on Multiple Galaxies. Communication at the Symposium of the
4. International Astronomical Union in Dublin. 1955. Akademiia Nauk Armianskoi SSR, Yerevan.
5. Ambartsumian V. A., 1958, in La structure et l’´evolution de l’universe. pp 241–249