@article{NSJOM_2014_44_1a_11,
     author = {C. Carpintero, and N. Rajesn, and E. Rosas and S. Saranyasri},
     title = {On upper and lower contra-$\omega$-continuous multifunctions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {143-151},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2014_44_1a_11/}
}