@article{01545116, title = {Curvature and symmetry of Milnor spheres.}, journal = {Annals of Mathematics. Second Series}, volume = {151}, year = {2000}, pages = {331-367}, doi = {10.2307/2661385}, zbl = {0991.53016}, language = {en}, url = {http://dml.mathdoc.fr/item/01545116} }
Grove, Karsten; Ziller, Wolfgang. Curvature and symmetry of Milnor spheres.. Annals of Mathematics. Second Series, Tome 151 (2000) pp. 331-367. doi : 10.2307/2661385. http://gdmltest.u-ga.fr/item/01545116/