TY  - JOUR
AU  - I. V. Maiorov
TI  - An extremum principle for a degenerate hyperbolic system
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 532
EP  - 535
VL  - 19
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_3_a21/
LA  - ru
ID  - DE_1983_19_3_a21
ER  -