Content based sketch annotations for collaboration. - Eun-Joo Sin; Yoon-Chul Choy; Soon-Bum Lim (SIGGRAPH Research Posters, 2006)

Study on 3D Annotation in Virtual Space for Collaboration. - Eun-Joo Sin; Yoon-Chul Choy; Soon-Bum Lim (CSE (1), 2009)