TY  - JOUR
AU  - V. V. Strygin
TI  - A theorem concerning the existence of periodic solutions of systems of differential equations with delayed arguments
JO  - Matematičeskie zametki
PY  - 1970
SP  - 229
EP  - 234
VL  - 8
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1970_8_2_a10/
LA  - ru
ID  - MZM_1970_8_2_a10
ER  -