@INPROCEEDINGS {
	AUTHOR = "Carlos Hurtado and C{\'e}sar Collazos and Luis Guerrero",
	TITLE = "Designing and Supporting Collaborative Activities",
	BOOKTITLE = "9th IFIP World Conference on Computers in Education (WCCE)",
	PAGES = "81",
	MONTH = "Jul",
	YEAR = "2009",
	ADDRESS = "Bento Gon{\c{c}}alvez, Porto Alegre, Brazil",
	ISBN = "978-3-901882-35-7",
	NOTE = "In CD-Rom",
	}