Hot gas in groups: NGC 5328 and the intriguing case of NGC 4756 with XMM-Newton G. Trinchieri, A. Marino, P. Mazzei, R. Rampazzo and A. Wolter A&A, 545 (2012) A140 Published online: 21 September 2012 DOI: 10.1051/0004-6361/201219775