@inproceedings{BX-2019-JohnsonRe,
	author        = "Michael Johnson and François Renaud",
	booktitle     = "{Proceedings of the Eighth International Workshop on Bidirectional Transformations}",
	ee            = "http://ceur-ws.org/Vol-2355/paper7.pdf",
	pages         = "66--70",
	publisher     = "{CEUR-WS.org}",
	title         = "{Symmetric c-Lenses and Symmetric d-Lenses are Not Coextensive}",
	year          = 2019,
}