Second harmonic generation in Ga nanoparticle monolayersA. M. Malvezzi, M. Patrini, A. Stella, P. Tognini, P. Cheyssac and R. KofmanEur. Phys. J. D, 16 1-3 (2001) 321-324DOI: https://doi.org/10.1007/s100530170120