@article {McCall:April 2006:1357-938X:135,
	author = "McCall, Mike",
	author = "Ashley, Holly",
	author = "Rambaldi, Giacomo",
	title = "The Snowball",
	journal = "Participatory Learning and Action",
	volume = "54",
	year = "April 2006",
	abstract = "",
	pages = "135-137(3)",
	url = "http://www.ingentaconnect.com/content/iiedpla/pla/2006/00000054/00000001/art00020"
}