This source preferred by Hamid Bouchachia

Authors: Pohl, D., Bouchachia, A. and Hellwagner, H.

http://www.igi-global.com/article/supporting-crisis-management-via-detection-of-sub-events-in-social-networks/96920

Journal: International Journal of Information Systems for Crisis Response and Management

Volume: 5

Issue: 3

Pages: 20-36

DOI: 10.4018/ijiscram.2013070102