@article{05005329, title = {Simple score sequences in oriented graphs.}, journal = {Novi Sad Journal of Mathematics}, volume = {33}, year = {2003}, pages = {25-29}, zbl = {1080.05514}, language = {en}, url = {http://dml.mathdoc.fr/item/05005329} }
Pirzada, S. Simple score sequences in oriented graphs.. Novi Sad Journal of Mathematics, Tome 33 (2003) pp. 25-29. http://gdmltest.u-ga.fr/item/05005329/