%0 Journal Article %A Dacorogna, Bernard %A Haeberly, Jean-Pierre %T Some numerical methods for the study of the convexity notions arising in the calculus of variations %J ESAIM: Modélisation mathématique et analyse numérique %D 1998 %P 153-175 %V 32 %N 2 %I Elsevier %U http://archive.numdam.org/item/M2AN_1998__32_2_153_0/ %G en %F M2AN_1998__32_2_153_0