@techreport{Fuhr/etal:01a,
  author={Norbert Fuhr and Norbert G{\"o}vert and Claus-Peter Klas},
  title={Recommendation in a Collaborative Digital Library Environment},
  institution={University of Dortmund, Germany},
  entrydate=20010823,
  key={Fuhr/etal:01a},
  year=2001,
}