@inproceedings{STOC-1990-KarpVV,
	author        = "Richard M. Karp and Umesh V. Vazirani and Vijay V. Vazirani",
	booktitle     = "{Proceedings of the 22nd Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/100216.100262",
	isbn          = "0-89791-361-2",
	pages         = "352--358",
	publisher     = "{ACM}",
	title         = "{An Optimal Algorithm for On-line Bipartite Matching}",
	year          = 1990,
}