@ARTICLE {
	AUTHOR = "Olivier Motelet and Nelson Baloian and Jos{\'e} A. Pino",
	TITLE ="Taking Advantage of Metadata Semantics: The Case of Learning-Object-based Lesson Graphs",
	JOURNAL = "Knowledge and Information Systems (KAIS)",
	VOLUME = "20",
	NUMBER = "3",
	PAGES = "323-348",
	MONTH = "Sep",
	YEAR = "2009",
	PUBLISHER = "Springer-Verlag",
	ADDRESS = "Berlin/Heidelberg, Germany",
	ISSN = "0219-1377"
	}