@article{CMH_1994__69_4_140322,
     author = {Alfonso Romero and F. J.M. Estudillo},
     title = {On the {Gauss} curvature of maximal surfaces in the 3-dimensional {Lorentz-Minkowski} space.},
     journal = {Commentarii mathematici Helvetici},
     pages = {1--4},
     publisher = {mathdoc},
     volume = {69},
     number = {4},
     year = {1994},
     zbl = {0810.53050},
     url = {http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140322/}
}