@techreport{Henschel-Hiltl92,
  author	= {Henschel, Renate and Hiltl, Waltraut},
  year		= {1992},
  title		= {How TFS conquered the PENMAN jungle --- Declarative representation and processing of the NIGEL grammar},
  address	= {Darmstadt, Germany},
  institution	= {GMD/Institut f{\"u}r Integrierte Publikations- und Informationssysteme, Darmstadt, West Germany}
}