-  Masahiro Ito, Kotaro Nakayama, Takahiro Hara, and Shojiro Nishio, "Association Thesaurus Construction Methods Based on Link Co-Occurrence Analysis for Wikipedia," In Proc. ACM Intl Conf. on Information and Knowledge Management (CIKM 2008), pages 817-826 October 2008.
-  Hara Takahiro Nakayama Kotaro Ito Masahiro and Nishio Shojiro, "Wikipedia Mining for Huge Scale Japanese Association Thesaurus Construction," In Proc. of MAW 2008, pages 1150-1155 March 2008.
-  Hara Takahiro Pei Minghua Nakayama Kotaro and Nishio Shojiro, "Constructing a Global Ontology by Concept Mapping Usingwikipedia Thesaurus," In Proc. of MAW 2008, 1205-1210 March 2008.
-  Nakayama Kotaro, Hara Takahiro, , and Nishio Shojiro, "Wikipedia Mining for an Association Web Thesaurus Construction," In Proc. of WISE2007, pages 322-334 December 2007.
-  Nakayama Kotaro, Hara Takahiro, , and Nishio Shojiro, "A Thesaurus Construction Method from Large Scale Web Dictionaries," In Proc. of AINA 2007, pages 932-939 May 2007.