TY  - JOUR
AU  - Yu. A. Ryabov
TI  - Estimations of the convergence region of periodical series representing solutions of differential equations involving a small parameter
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 642
EP  - 645
VL  - 118
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_118_4_a4/
LA  - ru
ID  - DAN_1958_118_4_a4
ER  -