Marisaldi, M., R. Rizzi, G. Levi, R. Malgesini, A. Villa, P. Mazza, C. Labanti, F. Fuschino, R. Campana, D. Bianchini, R. Brancaccio, A. Montanari, and L. Patrizii, Experimental study of hard-X ray emission from laboratory sparks, EGU General Assembly 2014, Vienna, Austria, April 27-May 2, 2014