@inproceedings{SIGMOD-1989-HouOT,
	author        = "Wen-Chi Hou and Gultekin Özsoyoglu and Baldeo K. Taneja",
	booktitle     = "{Proceedings of the 19th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD89/P068.PDF",
	doi           = "10.1145/67544.66933",
	pages         = "68--77",
	title         = "{Processing Aggregate Relational Queries with Hard Time Constraints}",
	year          = 1989,
}