1. B. Warner, Cataclysmic Variable Stars (Cambridge Univ. Press, Cambridge, 2003).
2. A. M. Cherepashchuk, Close Binary Stars (Fizmatlit, Moscow, 2013), Vols. 1, 2 [in Russian].
3. S. Tapia, Bull. Am. Astron. Soc. 8, 511 (1976).
4. A. G. Zhilkin, D. V. Bisikalo, and A. A. Boyarchuk, Phys. Usp. 55, 115 (2012).
5. D. V. Bisikalo, A. G. Zhilkin, and A. A. Boyarchuk, Gas Dynamics of Close Binary Stars (Fizmatlit, Moscow, 2013) [in Russian].