Estimating the Importance of Terrorists in a Terror Network. - Ahmed Elhajj; Abdallah M. ElSheikh; Omar Addam; Mohamad Alzohbi; Omar Zarour; Alper Aksaç; Orkun Öztürk; Tansel Özyer; Mick J. Ridley; Reda Alhajj (Mining Social Networks and Security Informatics, 2013)