@inproceedings{SIGMOD-1978-AhoSU,
	author        = "Alfred V. Aho and Yehoshua Sagiv and Jeffrey D. Ullman",
	booktitle     = "{Proceedings of the Eighth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD78/P039.PDF",
	doi           = "10.1145/509252.509268",
	pages         = "39",
	publisher     = "{ACM}",
	title         = "{Efficient Optimization of a Class of Relational Expressions}",
	year          = 1978,
}