Establishing HZ43 A, Sirius B, and RX J185635-3754 as soft X-ray standards: a cross-calibration between the Chandra LETG+HRC-S, the EUVE spectrometer, and the ROSAT PSPCK. Beuermann, V. Burwitz and T. RauchA&A, 458 2 (2006) 541-552DOI: https://doi.org/10.1051/0004-6361:20065478
