Comparison of the Hα circumstellar disks in Be/X-ray binaries and Be stars R. K. Zamanov, P. Reig, J. Martí, M. J. Coe, J. Fabregat, N. A. Tomov and T. Valchev A&A, 367 3 (2001) 884-890 Published online: 15 March 2001 DOI: 10.1051/0004-6361:20000533