%0 Journal Article
%A Mohamed Jouak
%A Lionel Thibault
%T Directional derivates and almost everywhere differentiability of biconvex and concave-convex operators.
%J Mathematica Scandinavica
%D 1985
%P 215-224
%V 57
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1985__57_166950/
%F MS2_1985__57_166950