@inproceedings{SIGMOD-1975-BernsteinST,
	author        = "Philip A. Bernstein and J. Richard Swenson and Dennis Tsichritzis",
	booktitle     = "{Proceedings of the Fifth ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD75/P237.PDF",
	doi           = "10.1145/500080.500112",
	pages         = "237--245",
	publisher     = "{ACM}",
	title         = "{A Unified Approach to Functional Dependencies and Relations}",
	year          = 1975,
}