@INPROCEEDINGS {
	AUTHOR = "Sebastian R{\'{\i}}os and Felipe Aguilera and Luis Guerrero",
	TITLE = "Virtual Communities of Practice's Purpose Evolution Analysis using a Concept-based Mining Approach",
	EDITOR = "Juan D. Vel{\'a}squez and Robert J. Howlett and Lakhmi C. Jain",
	BOOKTITLE = "International Conference on Knowledge-Based and Intelligent Information \& Engineering Systems (KES)",
	PAGES = "480-489",
	MONTH = "Sep",
	YEAR = "2009",
	ADDRESS = "Santiago, Chile",
	PUBLISHER = "Springer-Verlag",
	SERIES ="Lecture Notes in Artificial Intelligence",
	NUMBER = "5712",
	}