Sunscreen effects in skin analyzed by photoacoustic spectroscopy F.H. dos Anjos, P.C.B. Rompe, A.M. Mansanares, E.C. da Silva, D. Acosta-Avalos et P.R. Barja J. Phys. IV France, 125 (2005) 797-799 DOI: 10.1051/jp4:2005125184