@inproceedings{ICMT-2012-VallecilloG,
	author        = "Antonio Vallecillo and Martin Gogolla",
	booktitle     = "{Proceedings of the Fifth International Conference on Theory and Practice of Model Transformations}",
	doi           = "10.1007/978-3-642-30476-7_4",
	editor        = "Zhenjiang Hu and Juan de Lara",
	isbn          = "978-3-642-30475-0",
	pages         = "56--71",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Typing Model Transformations Using Tracts}",
	volume        = 7307,
	year          = 2012,
}