@article{10.30755/NSJOM.GF14.02,
     author = {G\"unther H\"ormann},
     title = {Conical spacetimes and global hyperbolicity},
     journal = {Novi Sad Journal of Mathematics},
     pages = {215 - 229},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2015},
     doi = {10.30755/NSJOM.GF14.02},
     url = {http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.GF14.02/}
}