XMM-Newton confirmation of soft X-ray excess emission in clusters of galaxies – The discovery of O VII emission from an extended warm baryonic componentJ. S. Kaastra, R. Lieu, T. Tamura, F. B. S. Paerels and J. W. den HerderA&A, 397 2 (2003) 445-462DOI: https://doi.org/10.1051/0004-6361:20021514
