On the nature asymmetry of the light curves of BM Cas, - a long period eclipsig supergigant binaryKalv, Peep; Harvig, Voldemar; Aas, Toomas; Pustõlnik, IzoldOdessa astronomical publications2006 / p. 61-64https://ui.adsabs.harvard.edu/abs/2005OAP....18...61K/abstract