Mid-Infrared femtosecond filament and three octaves continuum generation in gases S. Ališauskas, D. Kartashov, A. Pugžlis, A. Voronin, A. Zheltikov, M. Petrarca, P. Bejot, J. Kasparian and A. Baltuška EPJ Web of Conferences, 41 (2013) 10003 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134110003