1. Steering user behavior with badges;Anderson,2013
2. Badges in social media: A social psychological perspective;Antin,2011
3. Analysis and application of gamification;Aparicio,2012
4. A gamified tool for motivating developers to remove warnings of bug pattern tools. In 2014 6th international workshop on empirical software engineering in practice;Arai;IEEE,2014
5. Gamification in assessment: Do points affect test performance?;Attali;Computers & Education,2015