@inproceedings{SIGIR-2015-RenR,
	author        = "Zhaochun Ren and Maarten de Rijke",
	booktitle     = "{Proceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/2766462.2767713",
	isbn          = "978-1-4503-3621-5",
	pages         = "93--102",
	publisher     = "{ACM}",
	title         = "{Summarizing Contrastive Themes via Hierarchical Non-Parametric Processes}",
	year          = 2015,
}