TY  - JOUR
AU  - M. P. Grigolia
TI  - A generalization of the characteristic problem for hyperbolic systems
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 678
EP  - 686
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_4_a14/
LA  - ru
ID  - DE_1985_21_4_a14
ER  -