@article{00179261, title = {On totally umbilical }, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {16}, year = {1993}, pages = {405-408}, doi = {10.1155/S016117129300050X}, zbl = {0776.53031}, language = {en}, url = {http://dml.mathdoc.fr/item/00179261} }
Bashir, M.A. On totally umbilical . International Journal of Mathematics and Mathematical Sciences, Tome 16 (1993) pp. 405-408. doi : 10.1155/S016117129300050X. http://gdmltest.u-ga.fr/item/00179261/