X-ray outburst of 4U 0115+634 and ROTSE observations of its optical counterpart V635 CasA. Baykal, Ü. Kızıloǧlu, N. Kızıloǧlu, Ş. Balman and S. Ç. İnamA&A, 439 3 (2005) 1131-1134DOI: https://doi.org/10.1051/0004-6361:20052968