Design and Implementation of the Multiuser Index-based Data Access System. - Pyung-Chul Kim; Hwan-Ik Choi; Yoon-Joon Lee; Myung-Joon Kim (DASFAA, 1991)

The Semi Transaction Model for Cooperative Database Management. - Jai-Hyuk Lee; Yoon-Joon Lee; Pyung-Chul Kim (CODAS, 1996)