1. Y. H. YUM, 1984, Research Institute of Korean Spirits and Culture Report, 84-14, A study on the Korean bells
2. Y. H. YUM, J. M. LEE, 1985, Proceedings of JSME Vibration Conference at Tokyo, 79, 86, A study on the vibrations of Korean bells
3. Y. H. YUM, J. M. LEE, S. H. KIM, 1986, Proceedings of the 4th International Modal Analysis Conference, 75, 80, A study on the vibration and sounds of bells with slight asymmetry
4. A group theoretical approach to warble in ornamented bells;PERRIN;Journal of Sound and Vibration,1977
5. Studies with an eccentric bell;CHARNLEY;Journal of Sound and Vibration,1978