Jeong, J., J.- han Kang, and S. Moon. “Identifying and Quantifying Coordinated Manipulation of Upvotes and Downvotes in Naver News Comments”. Proceedings of the International AAAI Conference on Web and Social Media, Vol. 14, no. 1, May 2020, pp. 303-14, https://aaai.org/ojs/index.php/ICWSM/article/view/7301.