M. Tsvetovat, und K. Carley. Technical Report CMU-ISRI-05-130. Carnegie Mellon University, School of Computer Science, Institute for Software Research International, (2005)
M. Tsvetovat, J. Diesner, und K. Carley. Technical Report CMU-ISRI-04-135. Carnegie Mellon University, School of Computer Science, Institute for Software Research International, (2005)
J. Farley. Studies in Conflict and Terrorism, 26 (6):
399-411(November 2003)taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=1057-610X&volume=26&issue=6&spage=399.