TY  - JOUR
AU  - Mohamed Jouak
AU  - Lionel Thibault
TI  - Directional derivates and almost everywhere differentiability of biconvex and concave-convex operators.
JO  - Mathematica Scandinavica
PY  - 1985
SP  - 215
EP  - 224
VL  - 57
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1985__57_166950/
ID  - MS2_1985__57_166950
ER  -