Michael Sintek Markus Junker Ludger van Elst Andreas Abecker Using Information Extraction Rules for Extending Domain Ontologies. 2001 conf/ijcai/2001ol Workshop on Ontology Learning http://SunSITE.Informatik.RWTH-Aachen.DE/Publications/CEUR-WS/Vol-38/ijcai01-OL_sintek_etal.pdf db/conf/ijcai/ijcai2001ol.html#SintekJEA01