Application of a front detection photopyroelectric configuration to the study of nonlinear effects in liquid crystals phase transitions F. Mercuri, M. Marinelli, U. Zammit, R. Pizzoferrato et F. ScudieriJ. Phys. IV France, 04 C7 (1994) C7-253-C7-256DOI: https://doi.org/10.1051/jp4:1994760