@INPROCEEDINGS{sigir08-ZTW,  
  AUTHOR    = {Christian Zimmer and Christos Tryfonopoulos and Gerhard Weikum},  
  TITLE     = "{Exploiting Correlated Keywords to Improve Approximate Information Filtering}",  
  BOOKTITLE = "{Proceedings of the 31st Annual International ACM SIGIR Conference}",  
  YEAR      = {2008},
  MONTH     = {July},  
  ADDRESS   = "{Singapore}",
  PAGES		= {323--330},
}