Visibility problems for orthogonal objects in two- or three-dimensions. - Jeong-In Doh; Kyung-Yong Chwa (Vis. Comput., 1988)

An Algorithm for Determining Visibility of a Simple Polygon from an Internal Line Segment. - Jeong-In Doh; Kyung-Yong Chwa (J. Algorithms, 1993)

Off-line Recognition of Korean Scripts Using Distance Matching and Neural Network Classifiers. - Soo-Hyung Kim; Jeong-In Doh (ICDAR, 1995)