%0 Journal Article
%A Powers, Robert T.
%T An Index Theory for Semigroups of *-Endomorphisms of and Type II1 Factors.
%J Canadian journal of mathematics
%D 1988
%P 86-114
%V 40
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1988-004-3/
%R 10.4153/CJM-1988-004-3
%F 10_4153_CJM_1988_004_3