Geigle, C., H. Dev, H. Sundaram, and C. Zhai. “A Generative Model for Discovering Action-Based Roles and Community Role Compositions on Community Question Answering Platforms”. Proceedings of the International AAAI Conference on Web and Social Media, vol. 13, no. 01, July 2019, pp. 181-92, doi:10.1609/icwsm.v13i01.3220.