%0 Journal Article
%A A. I. Ivanov
%A G. S. Lomakin
%A O. A. Ponomarev
%T Investigation of systems with quadratic interaction by the method of functional derivatives
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1979
%P 273-284
%V 41
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1979_41_2_a9/
%G ru
%F TMF_1979_41_2_a9