Alexander Löser Christoph Tempich Bastian Quilitz Wolf-Tilo Balke Steffen Staab Wolfgang Nejdl Searching Dynamic Communities with Personal Indexes. 491-505 2005 conf/semweb/2005 International Semantic Web Conference http://dx.doi.org/10.1007/11574620_36 db/conf/semweb/iswc2005.html#LoserTQBSN05