TY  - JOUR
AU  - Yu. N. Bibikov
TI  - The existence of conditionally periodic solutions of systems of differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1347
EP  - 1356
VL  - 7
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_8_a0/
LA  - ru
ID  - DE_1971_7_8_a0
ER  -