TY  - JOUR
AU  - V. V. Filippov
TI  - On the acyclicity of solution sets of ordinary differential
JO  - Doklady Akademii Nauk
PY  - 1997
SP  - 28
EP  - 31
VL  - 352
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1997_352_1_a6/
LA  - ru
ID  - DAN_1997_352_1_a6
ER  -