TY  - JOUR
AU  - A. I. Perov
TI  - Topological characteristics of solutions of higher-dimensional differential equations
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 791
EP  - 794
VL  - 157
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_157_4_a9/
LA  - ru
ID  - DAN_1964_157_4_a9
ER  -