CCD photometry experiments at Tallinn ObservatoryAas, Toomas; Harvig, Voldemar; Mars, MarioTallinna Tähetorn = Tallinn Observatory2004 / 2, p. 9-54 : ill Observations of X Persei and 6 other Be starsKalv, Peep; Aas, Toomas; Harvig, VoldemarTallinna Tähetorn = Tallinn Observatory2004 / 2, p. 55-69 Photographic photometry of variable stars based on Tartu photoplate collectionAas, Toomas; Harvig, Voldemar; Mars, Mario; Rästas, M.Tallinna Tähetorn = Tallinn Observatory2005 / 1, p. 9-18 : ill., phot The observations of BM CasKalv, Peep; Aas, Toomas; Harvig, VoldemarTallinna Tähetorn = Tallinn Observatory2009 / 2, lk. 7-30 : ill The observations of EM Cep and V497 CepAas, Toomas; Harvig, Voldemar; Mars, MarioTallinna Tähetorn = Tallinn Observatory2009 / 1, p. 7-24 : ill