@inproceedings{ICGT-2002-GyapayHV,
	author        = "Szilvia Gyapay and Reiko Heckel and Dániel Varró",
	booktitle     = "{Proceedings of the First International Conference on Graph Transformations}",
	doi           = "10.1007/3-540-45832-8_11",
	editor        = "Andrea Corradini and Hartmut Ehrig and Hans-Jörg Kreowski and Grzegorz Rozenberg",
	isbn          = "3-540-44310-X",
	pages         = "120--134",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Graph Transformation with Time: Causality and Logical Clocks}",
	volume        = 2505,
	year          = 2002,
}