Silva, S. A. C. da, and C. M. Coelho. “Study Study: Mobile Application Using Gamifications for Students Who Will Do the National High School Exam.”. INFOCOMP Journal of Computer Science, vol. 16, no. 1-2, Dec. 2017, pp. 41-45, http://infocomp.dcc.ufla.br/index.php/infocomp/article/view/551.