@article{BMMS_2007_30_2_a0,
     author = {M. Caldas and S. Jafari and R.K. Saraf},
     title = {On {Some} {Maps} {Concerning} {ga-Open
Sets}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2007},
     volume = {30},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2007_30_2_a0/}
}