M. Kellar, C. Watters, and K. Inkpen. CHI '07: Proceedings of the SIGCHI conference on Human factors in computing systems, page 377--386. New York, NY, USA, ACM, (2007)
A. Kittur, E. Chi, and B. Suh. Proceedings of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 453--456. New York, NY, USA, ACM, (2008)
M. Kellar, C. Watters, and K. Inkpen. CHI '07: Proceedings of the SIGCHI conference on Human factors in computing systems, page 377--386. New York, NY, USA, ACM, (2007)
A. Kittur, E. Chi, and B. Suh. CHI '08: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems, page 453--456. New York, NY, USA, ACM, (2008)