An Information System Approach and Methodology for Enterprise Credit Rating. - Hakjoo Lee; Choon Seong Leem; Kyungyup Cha (ICCSA (3), 2005)

A Timestamp Tree-Based Cache Invalidation Report Scheme in Mobile Computing Environments. - Hakjoo Lee; Jonghyun Suh; Sungwon Jung; Sooyoung Lee; Junguck Lee (International Conference on Computational Science (2), 2006)

An Efficient Cache Invalidation Method in Mobile Client/Server Environment. - Hakjoo Lee; Jonghyun Suh; Sungwon Jung (IEICE Trans. Inf. Syst., 2007)