Webexpert, Expert Search Engine on a Specialized Field using the Conceptual Relationship. - Sa-Joon Park; Jae-Ho Kim; Ki-Tae Kim (IMSA, 2002)

Concept-based Search System using Context-conserving Extension based on Conceptual Graph. - Hwan-Kook Bae; Sa-Joon Park; Ki-Tae Kim (Applied Informatics, 2003)

Stock Price Prediction Using Backpropagation Neural Network in KOSPI. - Jae-Ho Kim; Sa-Joon Park; Ki-Tae Kim; Su-Chul Hwang (IC-AI, 2003)