Selective reflection spectroscopy of a vapour at a calcium fluoride interfaceT. Passerat de Silans, A. Laliotis, M. Romanelli, P. Chaves de Souza Segundo, I. Maurin, D. Bloch, M. Ducloy, A. Sarkisyan and D. SarkisyanAnn. Phys. Fr., 32 2-3 (2007) 191-194DOI: https://doi.org/10.1051/anphys:2008040