HIGHLY NONLINEAR OPTICAL EFFECTS IN LIQUID CRYSTALS S. D. Durbin, S. M. Arakelian, M. M. Cheung et Y. R. ShenJ. Phys. Colloques, 44 C2 (1983) C2-161-C2-169DOI: https://doi.org/10.1051/jphyscol:1983221