@article{KJM_2008_31_a11,
     author = {Shariefuddin Pirzada},
     title = {On imbalances in digraphs},
     journal = {Kragujevac Journal of Mathematics},
     pages = {143 },
     publisher = {mathdoc},
     volume = {31},
     year = {2008},
     zbl = {1199.05156},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2008_31_a11/}
}