%0 Journal Article
%A Yu. I. Volkov
%T Certain relations that are connected with semigroups of operators
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1973
%P 23-28
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1973_10_a2/
%G ru
%F IVM_1973_10_a2