@inproceedings{PPDP-2006-LohH,
	author        = "Andres Löh and Ralf Hinze",
	booktitle     = "{Proceedings of the Eighth International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/1140335.1140352",
	isbn          = "1-59593-388-3",
	pages         = "133--144",
	publisher     = "{ACM}",
	title         = "{Open data types and open functions}",
	year          = 2006,
}