References
- Choi, W. S., Lee, S., Eun, J. W., Choi, H., & Chae, D. S. 2000, KSAS International Journal, 1, 50
- Mo, H.-S., Lee, H.-J., & Lee, S.-P. 2000, Etri Journal, 22, 1 https://doi.org/10.4218/etrij.00.0100.0101
- Won, C.-H., Lee J.-S., Lee, B.-S., & Eun, J. W. 1999, Etri Journal 21, 29 https://doi.org/10.4218/etrij.99.0199.0305