@article{MAN_1982__261_182884,
     author = {Steven G. Harris},
     title = {On {Maximal} {Geodesic-Diameter} and {Causality} in {Lorentz} {Manifolds.}},
     journal = {Mathematische Annalen},
     pages = {307--314},
     year = {1982},
     volume = {261},
     zbl = {0486.53045},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__261_182884/}
}