%0 Journal Article %A Karsten Grove %A Wolfgang Ziller %T Curvature and symmetry of Milnor spheres %J Annals of mathematics %D 2000 %V 152 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2307/2661385/ %R 10.2307/2661385 %F 10_2307_2661385