@article{Pietsch1993,
  author    = {Pietsch, Wolfram},
  title     = {Verteilte Seminarentwicklung unter Lotus Notes},
  series = {ExperPraxis : ExperTeam-Jahrbuch f{\"u}r die Praxis der Informationsverarbeitung},
  journal   = {ExperPraxis : ExperTeam-Jahrbuch f{\"u}r die Praxis der Informationsverarbeitung},
  issn      = {0944-2863},
  pages     = {69 -- 70},
  year      = {1993},
  language  = {de}
}
@article{Weigand1993,
  author    = {Weigand, Christoph},
  title     = {On the Effects of SPC on Production Time},
  series = {Economic Quality Control. 8 (1993)},
  journal   = {Economic Quality Control. 8 (1993)},
  isbn      = {0940-5151},
  pages     = {23 -- 61},
  year      = {1993},
  language  = {en}
}