A Study on a Method of Estimating the Difficulty of Quizzes Focused on Quiz Types. International Conference on Computers in Education, [S. l.], 2011. DOI: 10.58459/icce.2011.1258. Disponível em: https://library.apsce.net/index.php/ICCE/article/view/1258. Acesso em: 6 oct. 2025.