TY  - JOUR
AU  - M. A. Krasnosel'skii
AU  - V. V. Strygin
TI  - Calculation of the rotation of completely continuous vector fields associated with the problem of periodic 

JO  - Doklady Akademii Nauk
PY  - 1963
SP  - 540
EP  - 543
VL  - 152
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1963_152_3_a8/
LA  - ru
ID  - DAN_1963_152_3_a8
ER  -