D. Moraes, Á. Guedes, V. Castro, L. Dias, and C. Soares Neto. " Analysis of a Gamification Based on Bartle Profiles in a Virtual Learning Environment", in Proceedings of the 30th Brazilian Symposium on Computers in Education, Brasília/DF, 2019, pp. 912-921, doi: https://doi.org/10.5753/cbie.sbie.2019.912.