VLT spectroscopy and non-LTE modeling of the C/O-dominated accretion disks in two ultracompact X-ray binariesK. Werner, T. Nagel, T. Rauch, N. J. Hammer and S. DreizlerA&A, 450 2 (2006) 725-733DOI: https://doi.org/10.1051/0004-6361:20053768
