%0 Journal Article %A Vlado Lubarda %T The elastic - plastic constitutive relation %J Theoretical and applied mechanics %D 1981 %P 101 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_1981_7_1_a11/ %G en %F TAM_1981_7_1_a11