Self phase modulation of a Gaussian laser beam through a non linear thin film F. Bloisi, L. Vicari, S. Martellucci, J. Quartieri et P. CavaliereRev. Phys. Appl. (Paris), 24 3 (1989) 411-415DOI: https://doi.org/10.1051/rphysap:01989002403041100