TY - JOUR AU - Shukichi Tanno TI - A Characterization of the Cannonical Spheres by the Spectrum. JO - Mathematische Zeitschrift PY - 1980 SP - 267 EP - 274 VL - 175 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1980__175_173038/ ID - MZ_1980__175_173038 ER -