TY  - JOUR
AU  - G. A. Seregin
TI  - Differential properties of extremals of variational problems that arise in the theory of plasticity
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 1033
EP  - 1044
VL  - 26
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_6_a12/
LA  - ru
ID  - DE_1990_26_6_a12
ER  -