On quasi-periodic intrinsic light varability in a close spectroscopic binary CX DraPustõlnik, Izold; Kalv, Peep; Harvig, Voldemar; Aas, ToomasModern problems of astronomy2007 / p. 54

The Tallinn Public Observatory in changing conditionsMars, Mario; Aas, Toomas; Harvig, VoldemarModern problems of astronomy2007 / p. 50