References

• Andronov I., 1994, Astron. Nach. 315, 353 NASA ADS
• Andronov I., Shugarov S., 1982, Astron. Tsirk., No. 1218, 3
• Andronov I., Fuhrmann B., Wenzel W., 1988, Astron. Nach. 309, 39 NASA ADS
• Borisov E.L., 1992, A&A 261, 154 NASA ADS
• Bruch A., 1992, A&A 266, 237 NASA ADS
• Cannizzo J.K., 1993, ApJ 419, 318 NASA ADS
• Cordova F., Jensen K., Nugent J., 1981, MNRAS 196, 1 NASA ADS
• Edelson R.A., Krolik J.H., 1988, ApJ 333, 646 NASA ADS
• Eggleton P.P., 1983, ApJ 268, 368 NASA ADS
• Elsworth Y.P., James J.F., 1982, MNRAS 198, 889 NASA ADS
• Fahlman G.G., Ulrych T.J., 1982, MNRAS 199, 53 NASA ADS
• Herter T., LaCasse M.G., Wesemael F., Winget R.A., 1979, ApJS 39, 513 NASA ADS
• Kirov N.K., Antov A.P., Genkov V.V., 1991, C.R. Acad. Bulg. Sci. 44, 5
• Kraicheva Z., Antov A., Genkov V., 1987, IBVS, No. 3093
• Kraicheva Z., Genkov V., 1992, IBVS, No. 3697
• Mason K.O., Kahn S.M., Bowyer C.S., 1979, Nat 280, 568 NASA ADS
• Panek R.J., 1980, ApJ 241, 1077 NASA ADS
• Ritter H., 1990, A&AS 85, 1179 NASA ADS
• Robinson E.L., Nather R.E., 1971, ApJS 39, 461 NASA ADS
• Robinson E.L., Barker E.S., Cochran W.D., Nather R.E., 1981, ApJ 251, 611 NASA ADS
• Romano G., Rosino L., 1980, IBVS, No. 1776
• Rosino L., Romano G., Marziani P., 1993, PASP 105, 51 NASA ADS
• Scargle J.D., 1982, ApJ 263, 835 NASA ADS
• Schneider D., Young P., Shectman S., 1981, ApJ 245, 644 NASA ADS
• Skillman D.R., Patterson J., Thorstensen J.R., 1995, PASP 107, 545 NASA ADS
• Tremko J., Andronov I.L., Chinarova L.L., et al., 1996, A&A 312, 121 NASA ADS
• van der Klis M., 1989, NATO ASI Ser., Ser C., Math. Phys. Sci. 262, 27
• Walker M., 1954, PASP 66, 71
• Walker M., 1966, Adv. Electron. Phys. 22B, 761
• Weber R., 1961, J. Obs., 44
• Wenzel W., Fuhrmann B., 1983, MVS 9, 175
• Wenzel W., Fuhrmann B., 1989, IBVS, No. 3391
• Williams G.A., Hiltner W.A., 1984, MNRAS 211, 629 NASA ADS
• Yamasaki T., Kato S., Mineshige S., 1995, PASJ 47, 59 NASA ADS