@inproceedings{ECDL-2009-FerroS,
	author        = "Nicola Ferro and Gianmaria Silvello",
	booktitle     = "{Proceedings of the 13th European Conference on Research and Advanced Technology for Digital Libraries}",
	doi           = "10.1007/978-3-642-04346-8_22",
	isbn          = "978-3-642-04345-1",
	pages         = "215--226",
	publisher     = "{Springer}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The NESTOR Framework: How to Handle Hierarchical Data Structures}",
	volume        = 5714,
	year          = 2009,
}