%0 Journal Article %A A. K. Gushchin %T $L_p$-estimates for the nontangential maximal function of the solution to a~second-order elliptic equation %J Sbornik. Mathematics %D 2016 %P 1384-1409 %V 207 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2016_207_10_a2/ %G en %F SM_2016_207_10_a2