%0 Journal Article
%A A. S. Markus
%T Some tests of completeness of the system of root vectors of a linear operator and the summability of series in that system
%J Doklady Akademii Nauk
%D 1964
%P 753-756
%V 155
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a8/
%G ru
%F DAN_1964_155_4_a8