@article{1206454435, author = {Cheng, Qing Ming and Nakagawa, Hisao}, title = {Totally umbilic hypersurfaces}, journal = {Hiroshima Math. J.}, volume = {20}, number = {3}, year = {1990}, pages = { 1-10}, language = {en}, url = {http://dml.mathdoc.fr/item/1206454435} }
Cheng, Qing Ming; Nakagawa, Hisao. Totally umbilic hypersurfaces. Hiroshima Math. J., Tome 20 (1990) no. 3, pp. 1-10. http://gdmltest.u-ga.fr/item/1206454435/