@article{BMMS_2000_23_1_a4,
     author = {A.R. Meenakshi},
     title = {Range
                        {Symmetric} {Matrices} in {Minkowski} {Space}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2000},
     volume = {23},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2000_23_1_a4/}
}