Selective reflection spectroscopy of a vapour at a calcium fluoride interface T. Passerat de Silans, A. Laliotis, M. Romanelli, P. Chaves de Souza Segundo, I. Maurin, D. Bloch, M. Ducloy, A. Sarkisyan and D. Sarkisyan Ann. Phys. Fr., 32 2-3 (2007) 191-194 Published online: 23 May 2008 DOI: 10.1051/anphys:2008040