TY  - JOUR
AU  - Reinhard Schultz
TI  - Differentiable Group Actions on Homotopy Spheres. I. Differential Structure and the Knot Invariant.
JO  - Inventiones mathematicae
PY  - 1976
SP  - 105
EP  - 128
VL  - 31
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1976__31_142357/
ID  - IM_1976__31_142357
ER  -