@inproceedings{PODS-2007-EngelfrietHS,
	author        = "Joost Engelfriet and Hendrik Jan Hoogeboom and Bart Samwel",
	booktitle     = "{Proceedings of the 26th Symposium on Principles of Database Systems}",
	doi           = "10.1145/1265530.1265540",
	isbn          = "978-1-59593-685-1",
	pages         = "63--72",
	publisher     = "{ACM}",
	title         = "{XML transformation by tree-walking transducers with invisible pebbles}",
	year          = 2007,
}