Literature sources:

DS/SI: DSS and SAI photographic photometry;
Cr/S7:V.P.Goranskij with the 38 cm reflector of Crimean Astrophysical Observatory or the 60 cm reflector of SAI Crimean Station and SBIG ST-7 camera.
47:E.A.Barsukova, V.P.Goranskij, A.V.Zharova, the SAI Crimean Station 60 cm Zeiss reflector + Apogee 47p CCD (corrected Rc=Rj+0.40; Ic=Ij+0.60);
Pi:V.P.Goranskij with the SAI Crimea Station 50 cm Maksutov telescope + Meade Pictor-416 CCD camera.
VJ:V.P.Goranskij, E.A.Barsukova, the SAI Crimean Station 60 cm Zeiss reflector + Apogee VersArray CCD Camera.
SO:E.A.Barsukova, V.P.Goranskij, the SAO 1 m Zeiss reflector + UBVRcIc photometer based on CCD 42-40.
6m:E.A.Barsukova, V.P.Goranskij, the Russian 6 m telescope BTA + SCORPIO spectral camera.
Gl:A.C.Gilmore, IAU Circ.No.5943,5944,5949;
pg/Ma:P.Martini, R.M.Wagner, A.Tomaney, R.M.Rich, M. Della Valle, P.H.Haushildt, AJ V.118, 1034, 1999;
BA:D.P.K.Banerjee, N.M.Ashok, ApJ V.604, L57, 2004;
BS:H.E.Bond, M.H.Siegel, AJ V.131, 984, 2006;
Ki:S.Kimeswenger, AN V.327, 44, 2006 (Ic = Ic[Kim]-0.43).
TS:R.Tylenda, L.A.Crause, S.K.Gorny, M.R.Schmidt, AsAp V.439, 65, 2005.