@inproceedings{TAGT-1994-EhrenfeuchtHR,
	author        = "Andrzej Ehrenfeucht and Tero Harju and Grzegorz Rozenberg",
	booktitle     = "{Selected Papers of the Fifth International Workshop on Graph Grammars and Their Application to Computer Science and Biology}",
	doi           = "10.1007/3-540-61228-9_108",
	editor        = "Janice E. Cuny and Hartmut Ehrig and Gregor Engels and Grzegorz Rozenberg",
	isbn          = "3-540-61228-9",
	pages         = "502--520",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Group Based Graph Transformations and Hierarchical Representations of Graphs}",
	volume        = 1073,
	year          = 1994,
}