BM cas: a long-period eclipsing binary with a supergiant and a common envelopeKalv, Peep; Harvig, Voldemar; Pustõlnik, IzoldAstrophysics and space science2005 / 1/4, p. 457-460 https://link.springer.com/chapter/10.1007/1-4020-3875-5_67