H. M. Koh
- (2020): Rebirth of Stone Bridge in the Cultural Context. Vorgetragen bei: IABSE Symposium: Synergy of Culture and Civil Engineering – History and Challenges, Wrocław, Poland, 7-9 October 2020.
- (2020): Realization of Timber Vehicle Bridge in Korea. Vorgetragen bei: IABSE Symposium: Synergy of Culture and Civil Engineering – History and Challenges, Wrocław, Poland, 7-9 October 2020.
- Characteristics of historical arch bridges in Korea. Vorgetragen bei: ARCH’07 – 5th International Conference on Arch Bridges, Madeira, Portugal, 12-14 September 2007. :