%0 Journal Article %A V. P. Mikhailov %T Existence of boundary values for metaharmonic functions %J Sbornik. Mathematics %D 1999 %P 1417-1448 %V 190 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1999_190_10_a1/ %G en %F SM_1999_190_10_a1