Article ISI
ASTRONOMY & ASTROPHYSICS  (2006)

Unveiling the nature of INTEGRAL objects through optical spectroscopy - V. Identification and properties of 21 southern hard X-ray sources

Masetti, N; Morelli, L; Palazzi, E; Galaz, G; Bassani, L; Bazzano, A; Bird, AJ; Dean, AJ; Israel, GL; Landi, R; Malizia, A; Minniti, D; Schiavone, F; Stephen, JB; Ubertini, P; Walter R.