X-ray spectroscopy of the Hertzsprung-gap giant star 31 Com, observed with XMM-Newton L. Scelsi, A. Maggio, G. Peres and Ph. Gondoin A&A, 413 2 (2004) 643-655 Published online: 18 December 2003 DOI: 10.1051/0004-6361:20034045