@inproceedings{SIGIR-2008-ZhouXZY,
	author        = "Ke Zhou and Gui-Rong Xue and Hongyuan Zha and Yong Yu",
	booktitle     = "{Proceedings of the 31st International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1390334.1390382",
	isbn          = "978-1-60558-164-4",
	pages         = "275--282",
	publisher     = "{ACM}",
	title         = "{Learning to rank with ties}",
	year          = 2008,
}