TY  - JOUR
AU  - A. P. Ivanov
TI  - On the problem of observation of perturbed systems
JO  - Differencialʹnye uravneniâ
PY  - 1978
SP  - 2071
EP  - 2072
VL  - 14
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1978_14_11_a16/
LA  - ru
ID  - DE_1978_14_11_a16
ER  -