Article
Astronomy and Astrophysics  (2012)

Unveiling the nature of INTEGRAL objects through optical spectroscopy IX. Twenty two more identifications, and a glance into the far hard X-ray Universe

Masetti N., Parisi P.; Jimenez-Bailon, E; Palazzi E., Chavushyan V.; Bassani L., Bazzano A.; Bird A.J., Dean A.J.; Galaz G., Landi R.; Malizia A., Minniti D.; Morelli L., Schiavone F.; Stephen J.B., Ubertini P.