@article{05695569, title = {Scalar curvature on lightlike hypersurfaces.}, journal = {APPS. Applied Sciences}, volume = {11}, year = {2009}, pages = {9-18}, zbl = {1187.53017}, language = {en}, url = {http://dml.mathdoc.fr/item/05695569} }
Atindogbé, Cyriaque. Scalar curvature on lightlike hypersurfaces.. APPS. Applied Sciences, Tome 11 (2009) pp. 9-18. http://gdmltest.u-ga.fr/item/05695569/