@inproceedings{ECOOP-1987-Riekert,
	author        = "Wolf-Fritz Riekert",
	booktitle     = "{Proceedings of the First European Conference on Object-Oriented Programming}",
	doi           = "10.1007/3-540-47891-4_13",
	editor        = "Jean Bézivin and Jean-Marie Hullot and Pierre Cointe and Henry Lieberman",
	isbn          = "3-540-18353-1",
	pages         = "131--139",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The ZOO Metasystem: A Direct-Manipulation Interface to Object-Oriented Knowledge Bases}",
	volume        = 276,
	year          = 1987,
}