@article{BMMS_2008_31_2_a11,
     author = {S. Murugesan and P. Thangavelu},
     title = {Fuzzy {Pre-semi-closed} {Sets}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2008},
     volume = {31},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2008_31_2_a11/}
}