TY  - JOUR
AU  - V. G. Boltyanskii
TI  - Homotopical classification of vector fields
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 13
EP  - 16
VL  - 118
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_118_1_a1/
LA  - ru
ID  - DAN_1958_118_1_a1
ER  -