The Gauss-Bonnet theorem for $2$-dimensional spacetimes.
Birman, Graciela S. ; Nomizu, Katsumi
Michigan Math. J., Tome 31 (1984) no. 1, p. 77-81 / Harvested from Project Euclid
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Publié le : 1984-05-14
Classification:  53C50 
@article{1029002964,
     author = {Birman, Graciela S. and Nomizu, Katsumi},
     title = {The Gauss-Bonnet theorem for $2$-dimensional spacetimes.},
     journal = {Michigan Math. J.},
     volume = {31},
     number = {1},
     year = {1984},
     pages = { 77-81},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1029002964}
}

Birman, Graciela S.; Nomizu, Katsumi. The Gauss-Bonnet theorem for $2$-dimensional spacetimes.. Michigan Math. J., Tome 31 (1984) no. 1, pp.  77-81. http://gdmltest.u-ga.fr/item/1029002964/