%0 Journal Article
%A L. K. Orlik
%T On the exponential characteristic of a Volterra integral operator with periodic kernel depending on four variables
%J Differencialʹnye uravneniâ
%D 1989
%P 1819-1821
%V 25
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_10_a27/
%G ru
%F DE_1989_25_10_a27