TY  - JOUR
AU  - C.McA. Gordon
AU  - A.J. Casson
TI  - A Loop Theorem for Duality Spaces and Fibred Ribbon Knots.
JO  - Inventiones mathematicae
PY  - 1983
SP  - 119
EP  - 138
VL  - 74
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1983__74_143064/
ID  - IM_1983__74_143064
ER  -