%0 Journal Article %A Lynda Selmani %T A frictionless contact problem for elastic-viscoplastic materials with internal state variable %J Applicationes Mathematicae %D 2013 %P 1-20 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am40-1-1/ %R 10.4064/am40-1-1 %G en %F 10_4064_am40_1_1