TY - JOUR AU - Toshiaki Adachi AU - Sadahiro Maeda TI - Isoparametric hypersurfaces with less than four principal curvatures in a sphere JO - Colloquium Mathematicum PY - 2006 SP - 143 EP - 148 VL - 105 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm105-1-13/ DO - 10.4064/cm105-1-13 LA - en ID - 10_4064_cm105_1_13 ER -