TY  - JOUR
AU  - V. I. Burenkov
AU  - E. M. Popova
TI  - Improvement of extension operators by means of approximation operators that preserve boundary values
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1986
SP  - 50
EP  - 54
VL  - 173
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1986_173_a4/
LA  - ru
ID  - TM_1986_173_a4
ER  -