Muthiah, S., B. Huang, J. Arredondo, D. Mares, L. Getoor, G. Katz, and N. Ramakrishnan. “Capturing Planned Protests from Open Source Indicators”. AI Magazine, vol. 37, no. 2, July 2016, pp. 63-75, doi:10.1609/aimag.v37i2.2631.