Photoacoustic study of gas permeability and diffusion in soils R.T. Faria Jr., S. Tibana, L.H. Poley, M.S. Sthel, F.T. de Almeida et H. Vargas J. Phys. IV France, 125 (2005) 673-675 DOI: 10.1051/jp4:2005125154