%0 Journal Article
%A C.McA. Gordon
%A A.J. Casson
%T A Loop Theorem for Duality Spaces and Fibred Ribbon Knots.
%J Inventiones mathematicae
%D 1983
%P 119-138
%V 74
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1983__74_143064/
%F IM_1983__74_143064