@inproceedings{SIGMOD-1987-HanH,
	author        = "Jiawei Han and Lawrence J. Henschen",
	booktitle     = "{Proceedings of the 17th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD87/P073.PDF",
	doi           = "10.1145/38713.38727",
	pages         = "73--81",
	title         = "{Handling Redundancy in the Processing of Recursive Database Queries}",
	year          = 1987,
}