TY  - JOUR
AU  - L. A. Ivanov
TI  - Huygens principle for equations dissociating into factors
JO  - Doklady Akademii Nauk
PY  - 1979
SP  - 829
EP  - 832
VL  - 245
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1979_245_4_a15/
LA  - ru
ID  - DAN_1979_245_4_a15
ER  -