TY  - JOUR
AU  - M. A. Aizerman
AU  - F. R. Gantmakher
TI  - Stability by means of a linear approximation of periodic solutions of a system of differential equations 

JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 527
EP  - 530
VL  - 116
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_116_4_a0/
LA  - ru
ID  - DAN_1957_116_4_a0
ER  -