Article ISI
Astronomy and Astrophysics  (2009)

Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources

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