On the Soft Excess in the X-ray Spectrum of Cir X-1: Revisitation of the Distance to Cir X-1
(2004)
Evidence of a Black Hole in the X-Ray Transient GS 1354–64 (=BW Circini)
The Astrophysical Journal American Astronomical Society 613:2 (2004) l133-l136
Long term variability of Cygnus X-1
Astronomy & Astrophysics EDP Sciences 425:3 (2004) 1061-1068
The relationship between radio luminosity and black hole mass in optically selected quasars
\mnras 353 (2004) L45-L49-L45-L49
GRS 1915+105 AND THE DISC-JET COUPLING IN ACCRETING BLACK HOLE SYSTEMS
Annual Review of Astronomy and Astrophysics Annual Reviews 42:1 (2004) 317-364