%0 Journal Article
%A I. K. Daugavet
%T Causal extension of operators
%J Doklady Akademii Nauk
%D 1985
%P 1299-1301
%V 283
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1985_283_6_a2/
%G ru
%F DAN_1985_283_6_a2