@article{01505609,
title = {Immersions with a parallel normal field.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {41},
year = {2000},
pages = {359-370},
zbl = {0980.53066},
language = {en},
url = {http://dml.mathdoc.fr/item/01505609}
}
Carter, Sheila; Kaya, Yusuf. Immersions with a parallel normal field.. Beiträge zur Algebra und Geometrie, Tome 41 (2000) pp. 359-370. http://gdmltest.u-ga.fr/item/01505609/