@inproceedings{KDD-2015-HanZ,
	author        = "Lei Han and Yu Zhang",
	booktitle     = "{Proceedings of the 21st International Conference on Knowledge Discovery and Data Mining}",
	doi           = "10.1145/2783258.2783393",
	isbn          = "978-1-4503-3664-2",
	pages         = "397--406",
	publisher     = "{ACM}",
	title         = "{Learning Tree Structure in Multi-Task Learning}",
	year          = 2015,
}