Matthias Bender Tom Crecelius Mouna Kacimi Sebastian Michel Thomas Neumann Josiane Xavier Parreira Ralf Schenkel Gerhard Weikum Exploiting social relations for query expansion and result ranking. 501-506 2008 ICDE Workshops http://dx.doi.org/10.1109/ICDEW.2008.4498369 conf/icde/2008w db/conf/icde/icdew2008.html#BenderCKMNPSW08