@article{CMH_1969__44_139418,
     author = {Katsumi Nomizu and Brian Smyth},
     title = {On the {Gauss} {Mapping} for {Hypersurfaces} of {Constant} {Mean} {Curvature} in the {Sphere.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {484--490},
     publisher = {mathdoc},
     volume = {44},
     year = {1969},
     zbl = {0184.47004},
     url = {http://geodesic.mathdoc.fr/item/CMH_1969__44_139418/}
}