%0 Journal Article
%A I. M. Singer
%T Future extensions of index theory and elliptic operators
%J Matematika
%D 1974
%P 52-61
%V 18
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1974_18_1_a1/
%G ru
%F MAT_1974_18_1_a1