@conference {889,
	title = {Motivating Participation by Displaying the Value of Contribution},
	booktitle = {ACM SIGCHI Conference on Human Factors in Computing Systems},
	year = {2006},
	month = {22/04/2006},
	pages = {955-958},
	publisher = {ACM},
	organization = {ACM},
	address = {Montreal, Quebec, Canada},
	isbn = {1-59593-372-7},
	author = {Al Mamunur Rashid and Kimberly Ling and Regina D Tassone and Paul Resnick and Robert Kraut and John Riedl}
}
