@article{NSJOM_2006_36_1a_4,
     author = {S. Pirzada and T.A. Naikoo and T.A. Chishti},
     title = {Score sets

 in oriented bipartite graphs},
     journal = {Novi Sad Journal of Mathematics},
     pages = {35-45},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2006_36_1a_4/}
}