%0 Journal Article
%A V. B. Kudryavtsev
%T On the functional system $\mathscr{P}_\Sigma$
%J Doklady Akademii Nauk
%D 1973
%P 521-522
%V 210
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_210_3_a2/
%G ru
%F DAN_1973_210_3_a2