TY  - JOUR
AU  - G. A. Leonov
TI  - The necessity of a frequency condition for the absolute stability of stationary systems in the critical case of a pair of pure imaginary roots
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 756
EP  - 759
VL  - 193
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_193_4_a4/
LA  - ru
ID  - DAN_1970_193_4_a4
ER  -