@inproceedings{PPDP-2013-LamoMRL,
	author        = "Yngve Lamo and Florian Mantz and Adrian Rutle and Juan de Lara",
	booktitle     = "{Proceedings of the 15th International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/2505879.2505900",
	isbn          = "978-1-4503-2154-9",
	pages         = "1--12",
	publisher     = "{ACM}",
	title         = "{A declarative and bidirectional model transformation approach based on graph co-spans}",
	year          = 2013,
}