Unveiling the nature of INTEGRAL objects through optical spectroscopy. VII. Identification of 20 Galactic and extragalactic hard X-ray sources
Journal article published in 2009 by
N. Masetti 
,
P. Parisi,
E. Palazzi,
E. Jiménez-Bailón,
L. Morelli ,
Chavushyan ,
E. Mason,
V.~A A. McBride,
L. Bassani,
A. Bazzano ,
A.~J J. Bird,
A.~J J. Dean,
G. Galaz,
N. Gehrels,
R. Landi
and other authors.
,
P. Parisi,
E. Palazzi,
E. Jiménez-Bailón,
L. Morelli ,
Chavushyan ,
E. Mason,
V.~A A. McBride,
L. Bassani,
A. Bazzano ,
A.~J J. Bird,
A.~J J. Dean,
G. Galaz,
N. Gehrels,
R. Landi
and other authors.
