@TechReport{Uszkoreit:1991_1,
      AUTHOR = {Uszkoreit, Hans},
      TITLE = {Adding Control Information to Declarative Grammars},
      YEAR = {1991},
      NUMBER = {RR-91-29},
      ADDRESS = {Saarbrücken},
      TYPE = {Research Report},
      INSTITUTION = {DFKI}
}