Googling around for Younis Tsouli produces some interesting links including this one:

TrackingTheThreat.com is database of open source information about the Al Qaeda terrorist network, developed as a research project of the FMS Advanced Systems Group. Our goal is to apply new technologies and software engineering approaches to open source intelligence while providing researchers and analysts with information about Al Qaeda.

This site has some interesting features:

Use the Network Navigator to perform graphical link analysis on the Al Qaeda network.

trackingthethreat.com