TY  - JOUR
AU  - Ya. V. Bykov
TI  - On singular periodic solutions of systems of ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1965
SP  - 851
EP  - 867
VL  - 1
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1965_1_7_a0/
LA  - ru
ID  - DE_1965_1_7_a0
ER  -