TY - JOUR AU - Karsten Grove AU - Wolfgang Ziller TI - Curvature and symmetry of Milnor spheres JO - Annals of mathematics PY - 2000 VL - 152 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.2307/2661385/ DO - 10.2307/2661385 ID - 10_2307_2661385 ER -