The dark web portal project: Collecting and analyzing the presence of terrorist groups on the web

Qin, J., Zhou, Y., Lai, G., Reid, E., Sageman, M., & Chen, H. (2005). The dark web portal project: Collecting and analyzing the presence of terrorist groups on the web. In Lecture Notes in Computer Science (Vol. 3495, pp. 623–624). Springer Verlag. https://doi.org/10.1007/11427995_78