@inproceedings{PernulR99,
  title = {COPS: A Model and Infrastructure for Secure and Fair Electronic Markets},
  author = {Günther Pernul and Alexander W. Röhm},
  year = {1999},
  url = {http://computer.org/proceedings/hicss/0001/00018/00018021abs.htm},
  researchr = {https://researchr.org/publication/PernulR99},
  cites = {0},
  citedby = {0},
  booktitle = {HICSS},
}