@article{GDZPPN002325888,
title = {Submanifolds with Geodesic Normal Sections.},
journal = {Mathematische Annalen},
volume = {268},
year = {1984},
pages = {417-430},
zbl = {0536.53053},
url = {http://dml.mathdoc.fr/item/GDZPPN002325888}
}
Chen, Bang-Yen; Verheyen, Paul. Submanifolds with Geodesic Normal Sections.. Mathematische Annalen, Tome 268 (1984) pp. 417-430. http://gdmltest.u-ga.fr/item/GDZPPN002325888/