@article{BMMS_2005_28_2_a2,
     author = {Rifat \c{C}olak and Mik\^ail Et},
     title = {On {Some} {Difference} {Sequence} {Set} and {Their} {Topological} {Properties}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2005},
     volume = {28},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2005_28_2_a2/}
}