Optical variabilities in the Be/X-ray binary system - GRO J2058+42 (CXOU J205847.5+414637)Ü. Kızıloğlu, N. Kızıloğlu, A. Baykal, S. K. Yerli and M. ÖzbeyA&A, 470 3 (2007) 1023-1029DOI: https://doi.org/10.1051/0004-6361:20077365