@article{10_4064__41_1_11_20,
     author = {John Beem},
     title = {Lorentzian geometry in the large},
     journal = {Banach Center Publications},
     pages = {11--20},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1997},
     doi = {10.4064/-41-1-11-20},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-41-1-11-20/}
}