TY  - JOUR
AU  - Yu. E. Linke
TI  - The problem of the existence of a subdifferential for continuous
JO  - Doklady Akademii Nauk
PY  - 1990
SP  - 784
EP  - 787
VL  - 315
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1990_315_4_a2/
LA  - ru
ID  - DAN_1990_315_4_a2
ER  -