XMM-Newton observations of AM CVn binaries: V396 Hya and SDSS J1240–01 G. Ramsay, P. J. Groot, T. Marsh, G. Nelemans, D. Steeghs and P. Hakala A&A, 457 2 (2006) 623-627 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20065491