TY  - JOUR
AU  - M. M. Simkin
TI  - Criterium of proximity of impulse- and continuous systems
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 783
EP  - 786
VL  - 210
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a8/
LA  - ru
ID  - DAN_1973_210_4_a8
ER  -