Vougiouklis, P., L. Carr, and E. Simperl. “Pie Chart or Pizza: Identifying Chart Types and Their Virality on Twitter”. Proceedings of the International AAAI Conference on Web and Social Media, Vol. 14, no. 1, May 2020, pp. 694-0, https://aaai.org/ojs/index.php/ICWSM/article/view/7335.