Unveiling the nature of INTEGRAL objects through optical spectroscopy - IX. Twenty two more identifications, and a glance into the far hard X-ray Universe
N. Masetti, P. Parisi, E. Jiménez-Bailón, E. Palazzi, V. Chavushyan, L. Bassani, A. Bazzano, A. J. Bird, A. J. Dean, G. Galaz, R. Landi, A. Malizia, D. Minniti, L. Morelli, F. Schiavone, J. B. Stephen and P. Ubertini
