@INPROCEEDINGS{Schmitt91,
   AUTHOR        = {Peter~H. Schmitt},
   BOOKTITLE     = {Text Understanding in LILOG, Final Report on the 
                    IBM Germany  LILOG-Project},
   EDITOR        = {C.-R.~Rollinger and O.~Herog},
   PAGES         = {394 -- 401},
   PUBLISHER     = {Springer Verlag},
   SERIES        = {Lecture Notes in AI},
   TITLE         = {Deductive aspects of three-valued logic},
   VOLUME        = {546},
   YEAR          = {1991}
}