%0 Journal Article
%A È. R. Tsekanovskii
%T The real and imaginary parts of an unbounded operator
%J Doklady Akademii Nauk
%D 1961
%P 48-51
%V 139
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_139_1_a11/
%G ru
%F DAN_1961_139_1_a11