@book{FroemingFuerstenau2007,
  author    = {Fr{\"o}ming, Jane and F{\"u}rstenau, Daniel},
  title     = {Entwicklungsstufen der Knowledge Modeling and Description Language (KMDL)},
  series = {Arbeitsbericht WI},
  volume    = {02},
  journal   = {Arbeitsbericht WI},
  year      = {2007},
  language  = {de}
}
@book{FroemingFuerstenau2007,
  author    = {Fr{\"o}ming, Jane and F{\"u}rstenau, Daniel},
  title     = {KMDL v2.1 : ene semiformale Modellierungssprache zur Modellierung von Wissenskonversionen},
  series = {Arbeitsbericht},
  volume    = {1},
  journal   = {Arbeitsbericht},
  year      = {2007},
  language  = {de}
}