@article{1178242949,
author = {Ryan, Patrick J.},
title = {Homogeneity and some curvature conditions for hypersurfaces},
journal = {Tohoku Math. J. (2)},
volume = {21},
number = {4},
year = {1969},
pages = { 363-388},
language = {en},
url = {http://dml.mathdoc.fr/item/1178242949}
}
Ryan, Patrick J. Homogeneity and some curvature conditions for hypersurfaces. Tohoku Math. J. (2), Tome 21 (1969) no. 4, pp. 363-388. http://gdmltest.u-ga.fr/item/1178242949/