Influence of humidity on granular packings with moving walls Y. Bertho, Th. Brunet, F. Giorgiutti-Dauphiné and J.-P. Hulin Europhys. Lett., 67 6 (2004) 955-961 Published online: 01 September 2004 DOI: 10.1209/epl/i2004-10157-x