%0 Journal Article
%A È. M. Saak
%T The solvability of the Dirichlet problem for an elliptic equation of order $21$ in the class $W_2^{(2l)}$
%J Differencialʹnye uravneniâ
%D 1973
%P 2048-2051
%V 9
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_11_a13/
%G ru
%F DE_1973_9_11_a13