TY  - JOUR
AU  - A. K. Gushchin
TI  - The Luzin area integral and the nontangential maximal function for solutions to a~second-order elliptic equation
JO  - Sbornik. Mathematics
PY  - 2018
SP  - 823
EP  - 839
VL  - 209
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2018_209_6_a2/
LA  - en
ID  - SM_2018_209_6_a2
ER  -