%0 Journal Article
%A Yu. G. Borisovich
%A Yu. I. Sapronov
%T On some topological invariants of nonlinear Fredholm mappings
%J Doklady Akademii Nauk
%D 1971
%P 12-15
%V 196
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_196_1_a1/
%G ru
%F DAN_1971_196_1_a1