@inproceedings{CIKM-2009-WangML,
	author        = "Shuaiqiang Wang and Jun Ma and Jiming Liu",
	booktitle     = "{Proceedings of the 18th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1645953.1646254",
	isbn          = "978-1-60558-512-3",
	pages         = "1879--1882",
	publisher     = "{ACM}",
	title         = "{Learning to rank using evolutionary computation: immune programming or genetic programming?}",
	year          = 2009,
}