TY  - JOUR
AU  - V. E. Ismailov
TI  - Approximation by sums of ridge functions with fixed directions
JO  - Algebra i analiz
PY  - 2016
SP  - 20
EP  - 69
VL  - 28
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2016_28_6_a1/
LA  - ru
ID  - AA_2016_28_6_a1
ER  -