1. Julia Affolderbach, Roger Alex Clapp, and Roger Hayter. 2012. Environmental bargaining and boundary organizations: remapping British Columbia's Great Bear Rainforest. Annals of the Association of American Geographers 102, 6 (2012), 1391--1408.
2. Judd Antin and Elizabeth F Churchill. 2011. Badges in social media: A social psychological perspective. In CHI 2011 Gamification Workshop Proceedings. ACM New York, NY, 1--4.
3. Dan Ariely, Anat Bracha, and Stephan Meier. 2009. Doing good or doing well? Image motivation and monetary incentives in behaving prosocially. American Economic Review 99, 1 (2009), 544--55.
4. Carlo C DiClemente, Angela S Marinilli, Manu Singh, and Lori E Bellino. 2001. The role of feedback in the process of health behavior change. American journal of health behavior 25, 3 (2001), 217--227.
5. Robert Gifford. 2011. The dragons of inaction: psychological barriers that limit climate change mitigation and adaptation. American Psychologist 66, 4 (2011), 290.