TY  - JOUR
AU  - Grove, Karsten
AU  - Wilking, Burkhard
TI  - A knot characterization and 1–connected nonnegatively curved 4–manifolds with circle symmetry
JO  - Geometry & topology
PY  - 2014
SP  - 3091
EP  - 3110
VL  - 18
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.3091/
DO  - 10.2140/gt.2014.18.3091
ID  - GT_2014_18_5_a9
ER  -