@article{1103841483, author = {Talbot, C. J.}, title = {Newman-Penrose approach to twisting degenerate metrics}, journal = {Comm. Math. Phys.}, volume = {12}, number = {1}, year = {1969}, pages = { 45-61}, language = {en}, url = {http://dml.mathdoc.fr/item/1103841483} }
Talbot, C. J. Newman-Penrose approach to twisting degenerate metrics. Comm. Math. Phys., Tome 12 (1969) no. 1, pp. 45-61. http://gdmltest.u-ga.fr/item/1103841483/