TY  - JOUR
AU  - M. E. Lerner
TI  - Maximum principles for equations of hyperbolic and mixed types in
JO  - Doklady Akademii Nauk
PY  - 1986
SP  - 550
EP  - 554
VL  - 287
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1986_287_3_a8/
LA  - ru
ID  - DAN_1986_287_3_a8
ER  -