A Characterization of the Cannonical Spheres by the Spectrum. Shukichi Tanno — 1980 Mathematische Zeitschrift
Killing vectors and geodesic flow vectors on tangent bundles. Shukichi Tanno — 1976 Journal für die reine und angewandte Mathematik
On a lower bound of the second eigenvalue of the Laplacian on an Einstein space Shukichi Tanno — 1978 Colloquium Mathematicae
Estimates of the first eigenvalue of a big cup domain of a 2-sphere Tadayuki Matsuzawa; Shukichi Tanno — 1982 Compositio Mathematica