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@article{AIHPA_1973__18_1_77_0, author = {Robson, E. H.}, title = {Null hypersurfaces in general relativity theory}, journal = {Annales de l'I.H.P. Physique th\'eorique}, pages = {77--88}, publisher = {Gauthier-Villars}, volume = {18}, number = {1}, year = {1973}, mrnumber = {327255}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AIHPA_1973__18_1_77_0/} }
Robson, E. H. Null hypersurfaces in general relativity theory. Annales de l'I.H.P. Physique théorique, Tome 18 (1973) no. 1, pp. 77-88. http://geodesic.mathdoc.fr/item/AIHPA_1973__18_1_77_0/