%0 Journal Article %A Toshiaki Adachi %A Sadahiro Maeda %T Isoparametric hypersurfaces with less than four principal curvatures in a sphere %J Colloquium Mathematicum %D 2006 %P 143-148 %V 105 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm105-1-13/ %R 10.4064/cm105-1-13 %G en %F 10_4064_cm105_1_13