@inproceedings{CSCW-2002-ShenS,
	author        = "Haifeng Shen and Chengzheng Sun",
	booktitle     = "{Proceedings of the Ninth ACM Conference on Computer Supported Cooperative Work}",
	doi           = "10.1145/587078.587090",
	isbn          = "1-58113-560-2",
	pages         = "77--86",
	publisher     = "{ACM}",
	title         = "{Flexible notification for collaborative systems}",
	year          = 2002,
}