Noack, Andreas. Modularity clustering is force-directed layout. Year 2008.
Schmitz, Christoph and Hotho, Andreas and Jäschke, Robert and Stumme, Gerd. Content Aggregation on Knowledge Bases using Graph Clustering. The Semantic Web: Research and Applications. editor(s) Sure, York and Domingue, John. LNAI, (4011) 530-544, Springer, Heidelberg, Year 2006.