@inproceedings{SIGMOD-2008-TianHP,
	author        = "Yuanyuan Tian and Richard A. Hankins and Jignesh M. Patel",
	booktitle     = "{Proceedings of the 26th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1376616.1376675",
	isbn          = "978-1-60558-102-6",
	pages         = "567--580",
	publisher     = "{ACM}",
	title         = "{Efficient aggregation for graph summarization}",
	year          = 2008,
}