@article{BMMS_2005_28_1_a7,
     author = {M.K.R.S. Veera Kumar},
     title = {Contra-Pre-Semi-Continuous {Functions}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2005},
     volume = {28},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2005_28_1_a7/}
}