@InProceedings{kruegel03:webanomaly,
  author = 	 {Christopher Kruegel and Giovanni Vigna},
  title = 	 {{Anomaly Detection of Web-based Attacks}},
  booktitle =	 {Proceedings of the ACM Conference on Computer and Communications Security (CCS)},
  year =	 2003,
  address =	 {Washington, DC},
  pages =	 {251--261},
  month =	 {October},
  publisher =	 {ACM Press}
}