Numerical simulations of the nonlinear propagation of femtosecond optical pulses in gases A. Chiron, B. Lamouroux, R. Lange, J.-F. Ripoche, M. Franco, B. Prade, G. Bonnaud, G. Riazuelo and A. Mysyrowicz Eur. Phys. J. D, 6 3 (1999) 383-396 Published online: 15 June 1999 DOI: 10.1007/s100530050322