%0 Journal Article
%A I. P. Polovinkin
%T The converse of the mean-value theorem for the wave equation
%J Differencialʹnye uravneniâ
%D 1991
%P 1987-1990
%V 27
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1991_27_11_a18/
%G ru
%F DE_1991_27_11_a18