E. Gonçalves, J. Vilela, and J. Bezerra.
" Statistical Analysis of Grades and Interactions in Distance Education Courses", in <em>Proceedings of the 29th Brazilian Symposium on Computers in Education</em>, Fortaleza/CE, 2018, pp. 71-80, doi: <a href="https://doi.org/10.5753/cbie.sbie.2018.71">https://doi.org/10.5753/cbie.sbie.2018.71</a>.