Yang, Q., W. Wang, L. Pierce, R. Vaish, X. Shi, and N. Shah. “Online Communication Shifts in the Midst of the Covid-19 Pandemic: A Case Study on Snapchat”. Proceedings of the International AAAI Conference on Web and Social Media, vol. 15, no. 1, May 2021, pp. 830-4, doi:10.1609/icwsm.v15i1.18107.