Zeileis, Achim, Nikolaus Umlauf, and Friedrich Leisch. “Flexible Generation of E-Learning Exams in R: Moodle Quizzes, OLAT Assessments, and Beyond”. Journal of Statistical Software 58, no. 1 (June 25, 2014): 1–36. Accessed November 21, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v058i01.