Photometric investigation of the gravitational lens SBS 1520+530 at the 6m T elescope

@inproceedings{Vlasyuk1998PhotometricIO,
  title={Photometric investigation of the gravitational lens SBS 1520+530 at the 6m T elescope},
  author={V. V. Vlasyuk and Vahram H. Chavushyan},
  year={1998}
}