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Journal of Information Science : Database vol33  No.4 ISSN 1229-7739 pp.396~408

Changhun Lee, Duksung Lim, Bonghee Hong

Journal of Information Science : Database vol33  No.3  ISSN 1229-7739 pp. 271~282

Jaekwan Park, Kyunghwan An, Jiwon Jung, Bonghee Hong

Journal of Information Science : Database vol 33  No.1 pp 100 ~ 110.
Young Duk Seo, DongHyun Kim, Bong Hee Hong