@article{BMMS_2002_25_2_a4,
     author = {AR. Meenakshi and D. Krishnaswamy},
     title = {On
                        {Sums} of {Range} {Symmetric} {Matrices} in {Minkowski} {Space}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2002},
     volume = {25},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2002_25_2_a4/}
}