• BM Cas - a long-period eclipsing young supergiant binary system in common envelope stagePustõlnik, Izold; Kalv, Peep; Harvig, Voldemar; Aas, ToomasAstronomical and astrophysical transactions2007 / 4/5, p. 339-350 https://www.tandfonline.com/doi/abs/10.1080/10556790701553532
• Light-time effect in selected semi-detached and contact binaries with observable third componentsPustõlnik, Izold; Kalv, Peep; Aas, Toomas; Harvig, Voldemar; Mars, MarioThe Light-time Effect in Astrophysics, Causes and Cures of O-C diagrams2005 / p. 321-330 https://articles.adsabs.harvard.edu/pdf/2005ASPC..335..321P
• On the nature of asymmetry of the light curves of BM Cas - a long period eclipsing supergiant binaryKalv, Peep; Harvig, Voldemar; Aas, Toomas; Pustõlnik, IzoldVariable stars - 20052007 / p. 61-64 https://ui.adsabs.harvard.edu/abs/2005OAP....18...61K/abstract