%0 Journal Article
%A V. I. Rabanovich
%A Yu. S. Samoilenko
%T When a Sum of Idempotents or Projections is a Multiple of the Identity
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 2000
%P 91-93
%V 34
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_2000_34_4_a11/
%G ru
%F FAA_2000_34_4_a11