Photoelectric observations:


 taken with the 3-channel photometer and
the 60-cm telescope at Mt. Suhora Observatory
 (AB And & DK Cyg)
50-cm telescope and CCD camera at Cracow Observatory
(GZ And)
50-cm telescope and CCD camera at Skibotn Observatory (Norway)
(AO Cam & DN Cam)



                                                                                                  AB And   - UBVR
GZ And   -    VRI
AO Cam  -  VRI
DN Cam  -   BVRI
DK Cyg  -  BVR



  Results of LC modeling published by Baran et al. (2004), Acta Astronomica  54, 195