@article{GRSME_1999_1999_1_a10,
     author = {Ehrlich, Paul},
     title = {Rigidez de curvatura e incompletitud geod\'esica temporal en la geometr{\'\i}a del espacio-tiempo.},
     journal = {La Gaceta de la Real Sociedad Matem\'atica Espa\~nola},
     pages = {290-304},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1999},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GRSME_1999_1999_1_a10/}
}