@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/