%0 Journal Article
%A O. I. Zavialov
%A P. B. Medvedev
%T The $R$-operation in the $\lambda\varphi^4$-theory as a consequence of an indefinite metric in the extended space of states (lowest orders)
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1974
%P 27-38
%V 18
%N 1
%U http://geodesic.mathdoc.fr/item/TMF_1974_18_1_a2/
%G ru
%F TMF_1974_18_1_a2