%0 Journal Article
%A V. V. Volchkov
%T New theorems on the~mean for solutions of the~Helmholtz equation
%J Sbornik. Mathematics
%D 1994
%P 281-286
%V 79
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1994_79_2_a2/
%G en
%F SM_1994_79_2_a2