TY  - JOUR
AU  - D. K. Lika
AU  - Yu. A. Ryabov
TI  - Convergence of the small parameter method in the construction of periodic solutions of ordinary differential equations of neutral type with small lag
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 1977
EP  - 1987
VL  - 8
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_11_a8/
LA  - ru
ID  - DE_1972_8_11_a8
ER  -