@inproceedings{mushtaq.BuildingEvaluatingNOP,
  author    = {Naveed Mushtaq and Peter Werner and Karsten Tolle and Roberto Zicari},
  title     = {Building and Evaluating Non-Obvious User Profiles for Visitors of Web Sites},
  booktitle = {IEEE Conference on E-Commerce Technology (CEC 2004)},
  year      = {2004},
  isbn      = {0-7695-2098-7},
  pages     = {9-15},
  doi       = {http://doi.ieeecomputersociety.org/10.1109/ICECT.2004.1319712},
  publisher = {IEEE Computer Society},
  address   = {Los Alamitos, CA, USA},
  note      = {\url{http://www.dbis.cs.uni-frankfurt.de/downloads/research/non_obvious_profiles.pdf}}
}