@article{1181072662,
author = {Law, Peter R.},
title = {Neutral Geometry and the Gauss-Bonnet Theorem for Two-dimensional Pseudo-Riemannian Manifolds},
journal = {Rocky Mountain J. Math.},
volume = {22},
number = {4},
year = {1992},
pages = { 1365-1383},
language = {en},
url = {http://dml.mathdoc.fr/item/1181072662}
}
Law, Peter R. Neutral Geometry and the Gauss-Bonnet Theorem for Two-dimensional Pseudo-Riemannian Manifolds. Rocky Mountain J. Math., Tome 22 (1992) no. 4, pp. 1365-1383. http://gdmltest.u-ga.fr/item/1181072662/