Extracting and Utilizing of IS-A Relation Patterns for Question Answering Systems. - Bojun Shim; Youngjoong Ko; Jungyun Seo (AIRS, 2005)

Using IS-A Relation Patterns for Factoid Questions in Question Answering Systems. - Bojun Shim; Youngjoong Ko; Jungyun Seo (IEICE Trans. Inf. Syst., 2006)