%0 Journal Article
%A A. I. Shnirel'man
%T The degree of a~quasi-ruled mapping and a~nonlinear Hilbert problem
%J Sbornik. Mathematics
%D 1972
%P 373-396
%V 18
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1972_18_3_a1/
%G en
%F SM_1972_18_3_a1