XMM-Newton and Swift observations of WZ Sagittae: spectral and timing analysis A. A. Nucita, E. Kuulkers, F. De Paolis, K. Mukai, G. Ingrosso and B. M. T. Maiolo A&A, 566 (2014) A121 Published online: 23 June 2014 DOI: 10.1051/0004-6361/201322875