Shu, K., D. Mahudeswaran, S. Wang, and H. Liu. “Hierarchical Propagation Networks for Fake News Detection: Investigation and Exploitation”. Proceedings of the International AAAI Conference on Web and Social Media, vol. 14, no. 1, May 2020, pp. 626-37, https://ojs.aaai.org/index.php/ICWSM/article/view/7329.