UBVR Photometry of HDE:245770 = A:0535+26 in 1986-1989 Berdnik, E. V. ; Gorshanov, D. L. ; Maslennikov, K. L. ; Somsikov, V. V. Abstract Publication: Soviet Astronomy Letters Pub Date: November 1990 Bibcode: 1990SvAL...16..472B