TY  - JOUR
AU  - S. K. Smirnov
AU  - V. P. Havin
TI  - Approximation and extension problems for some classes of vector fields
JO  - Algebra i analiz
PY  - 1998
SP  - 133
EP  - 162
VL  - 10
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_1998_10_3_a5/
LA  - ru
ID  - AA_1998_10_3_a5
ER  -