Bhowmick, A. K., S. Pramanik, S. Pathak, and B. Mitra. “On the Role of Micro-Categories to Characterize Event Popularity in Meetup”. Proceedings of the International AAAI Conference on Web and Social Media, vol. 15, no. 1, May 2021, pp. 71-82, doi:10.1609/icwsm.v15i1.18042.