Abstract
Two eclipsing binary systems EW Lyr and IV Cas have been investigated for period changes, the light-time effect was presented and the third body was found on its 78 and 58 years long orbit.
Two eclipsing binary systems EW Lyr and IV Cas have been investigated for period changes, the light-time effect was presented and the third body was found on its 78 and 58 years long orbit.