@inproceedings{PODS-1994-HillebrandK,
	author        = "Gerd G. Hillebrand and Paris C. Kanellakis",
	booktitle     = "{Proceedings of the 13th Symposium on Principles of Database Systems}",
	doi           = "10.1145/182591.182615",
	isbn          = "0-89791-642-5",
	pages         = "222--231",
	publisher     = "{ACM Press}",
	title         = "{Functional Database Query Languages as Typed Lambda Calculi of Fixed Order}",
	year          = 1994,
}