%0 Journal Article
%A A. K. Kazanskii
%T Equations for Green's functions obtained from a~variational principle
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1974
%P 3-12
%V 21
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1974_21_1_a0/
%G ru
%F TMF_1974_21_1_a0