Chandra Detections of Two Quiescent Black Hole X-Ray Transients
The Astrophysical Journal American Astronomical Society 597:2 (2003) l133-l136
Evidence of a decrease of kHz quasi-periodic oscillation peak separation towards low frequencies in 4U 1728–34 (GX 354–0)
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 345:3 (2003) l35-l39