Júlio César Rosa da Silva, Erica Rodrigues de Oliveira, Glívia A. Rodrigues Barbosa. Characterizing gamification strategies in educational mobile applications: a case study of duolingo. In Proceedings of the 14th Brazilian Symposium on Human Factors in Computing Systems, IHC 2015, Salvador, Brazil, November 03-06, 2015. ACM, 2015. [doi]
Abstract is missing.