Unsupervised Keyphrase Extraction for Search Ontologies. - Jon Atle Gulla; Hans Olaf Borch; Jon Espen Ingvaldsen (NLDB, 2006)

Ontology Learning for Search Applications. - Jon Atle Gulla; Hans Olaf Borch; Jon Espen Ingvaldsen (OTM Conferences (1), 2007)