@inproceedings{ECOOP-2008-BruckerW,
	author        = "Achim D. Brucker and Burkhart Wolff",
	booktitle     = "{Proceedings of the 22nd European Conference on Object-Oriented Programming}",
	doi           = "10.1007/978-3-540-70592-5_19",
	editor        = "Jan Vitek",
	isbn          = "978-3-540-70591-8",
	pages         = "438--462",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Extensible Universes for Object-Oriented Data Models}",
	volume        = 5142,
	year          = 2008,
}