Photoacoustic spectroscopy-based analysis of gas samples in a bus station M.S. Sthel, D.U. Schramm, R.T. Faria Jr., M.P.P. Castro, L.O. Carneiro, W.S. Ribeiro et H. Vargas J. Phys. IV France, 125 (2005) 881-883 DOI: 10.1051/jp4:2005125204