@ARTICLE{MTW:ECT-99,
  author  = {Michael Merz and Tuan Tu and Winfried Lamersdorf},
  title   = {Electronic Commerce: Technologische und organisatorische Grundlagen},
  journal = {Informatik-Spektrum},
  year    = {1999},
  volume  = {22},
  number  = {5},
  pages   = {328-343}
}