@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040271, author = {Ando, Naoya}, issue = {3}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {}, note = {application/pdf}, pages = {423--433}, title = {Strict Convexity of Hypersurfaces in Spheres}, volume = {5}, year = {1998} }