Guerra, P., W. Meira Jr., C. Cardie, and R. Kleinberg. “A Measure of Polarization on Social Media Networks Based on Community Boundaries”. Proceedings of the International AAAI Conference on Web and Social Media, vol. 7, no. 1, Aug. 2021, pp. 215-24, doi:10.1609/icwsm.v7i1.14421.