1. Ambartsumian, V. A.: 1957, in G. Herbig (ed.), ‘Non-Stable Stars’, IAU Symp. 3, 177.
2. Ambartsumian, V. A. and Mirzoyan, L. V.: 1971, in ‘New Directions and New Frontiers in Variable Star Research’, IAU Colloq. 15, Veröff. Bamberg
9, 98.
3. Ambartsumian, V. A., Mirzoyan, L. V., Parsamian, E. S., Chavushian, H. S., and Erastova, L. K.: 1971, Astrofizika
7, 319.
4. Ambartsumian, V. A., Mirzoyan, L. V., Parsamian, E. S., Chavushian, H. S., Erastova, L. K., Kazarian, E. S., and Ohanian, G. B.: 1972, Astrofizika
8, 485.
5. Andrews, A. D.: 1964, Irish Astron. J. 6, 212.