High resolution optical and infrared spectroscopic observations of Cir X-1
(1999)
Low Luminosity States of the Black Hole Candidate GX 339-4. I. ASCA and Simultaneous Radio/RXTE Observations
(1999)
Infrared spectroscopic variability of Cygnus X-3 in outburst and quiescence
(1999)
Orbital modulation and longer term variability in the radio emission from Cygnus X-1
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 302:1 (1999) l1-l5