Automatic Summarization Based on Principal Component Analysis. - Chang Beom Lee; Min-Soo Kim 007; Hyuk Ro Park (EPIA, 2003)

Extracting the Significant Terms from a Sentence-Term Matrix by Removal of the Noise in Term Usage. - Chang Beom Lee; Hoseop Choe; Hyuk Ro Park; Cheolyoung Ock (AIRS, 2005)

Significant Sentence Extraction by Euclidean Distance Based on Singular Value Decomposition. - Chang Beom Lee; Hyuk Ro Park; Cheolyoung Ock (IJCNLP, 2005)

Feature Extraction of Concepts by Independent Component Analysis. - Altangerel Chagnaa; Cheolyoung Ock; Chang Beom Lee; Purev Jaimai (J. Inf. Process. Syst., 2007)