1. Avni, Y., Schiller, N.: Astrophys. J. 257, 703 (1982)
2. Csataryova, M., Skopal, A.: Contrib. Astron. Obs. Skalnate Pleso 35, 17 (2005)
3. Eggleton, P.P.: Astrophys. J. 268, 368 (1983)
4. Kopal, Z.: Close Binary Systems. Chapman and Hall, London (1959)
5. Advances in Astron. Astrophys.;Z. Kopal,1972