TY  - JOUR
AU  - L. È. Èl'sgol'ts
TI  - Estimation of the number of critical points of a continuous mapping of a manifold onto a circle
JO  - Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta
PY  - 1954
SP  - 34
EP  - 38
VL  - 165
IS  - 165
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UZMU_1954_165_165_a1/
LA  - ru
ID  - UZMU_1954_165_165_a1
ER  -