TY  - JOUR
AU  - A. I. Perov
TI  - The zero-manifolds of solutions of multidimensional differential equations of the second order
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 1254
EP  - 1256
VL  - 168
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_168_6_a8/
LA  - ru
ID  - DAN_1966_168_6_a8
ER  -