1. A. G. Masevich and A. V. Tutukov, Stellar Evolution: Theory and Observations (Nauka, Moscow, 1988) [in Russian].
2. V. G. Kornilov and V. M. Lipunov, Astron. Zh. 60, 284 (1983).
3. A. M. Cherepashchuk, Close Binary Stars (Fizmatlit, Moscow, 2013) [in Russian].
4. P. P. Parenago and A. G. Masevich, Tr. GAISh 20, 81 (1950).
5. A. A. Boyarchuk, Sov. Astron. 3, 748 (1959).