@article{04013468, title = {Totally umbilical CR-submanifolds of semi-Riemannian K\"ahler manifolds.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {10}, year = {1987}, pages = {551-556}, doi = {10.1155/S0161171287000668}, zbl = {0624.53030}, language = {en}, url = {http://dml.mathdoc.fr/item/04013468} }
Duggal, K.L.; Sharma, R. Totally umbilical CR-submanifolds of semi-Riemannian Kähler manifolds.. International Journal of Mathematics and Mathematical Sciences, Tome 10 (1987) pp. 551-556. doi : 10.1155/S0161171287000668. http://gdmltest.u-ga.fr/item/04013468/