Pietsch, W., Mochejska, B. J., Misanovic, Z., Haberl, F., Ehle, M., & Trinchieri, G. (2004). The eclipsing massive X-ray binary M 33 X-7: New X-ray observations and optical identification. Astronomy & Astrophysics, 413, 879-887. doi:10.1051/0004-6361:20034081.