@conference {singh:iv07, title = {Visual mining of multi-modal social networks at different abstraction levelsx}, booktitle = {L. Singh, M. Beard, L. Getoor, M. Blake. Visual mining of multi-modal social networks at different abstraction levels. IEEE Conference on Information Visualization - Symposium of Visual Data Mining (IV-VDM)}, year = {2007}, author = {Singh, Lisa and Beard, Mitchell and Lise Getoor and Blake, M. Brian} }