TY  - JOUR
AU  - A. N. Tikhonov
TI  - Approximate functional equations of the first kind
JO  - Informatics and Automation
PY  - 1981
SP  - 197
EP  - 202
VL  - 158
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1981_158_a16/
LA  - ru
ID  - TRSPY_1981_158_a16
ER  -