1. Cho, J.Y., 2001, A study on the water quality improvement system for small stream. M.S. thesis, Seoul National Polytechnic University, Seoul, 71 p (in Korean with English abstract).
2. Choi, G.C., Seong, I.H, Kim, D.W., Kim, Y.H., Kim, T.Y., Yoo, B.R., Lee, S.S., Lee, J.Y. and Lee, H.S., 2016, Notes on Water Pollution Process Test Standards. Donghwa Technology Publishing Company (in Korean).
3. Choi, S.h., Kim, H.S. and Chung, S.W., 2019, Estimation of Water Quality Improvement and Reduction of Influent Pollution by Installation of Water treatment System Filled with Bio-stone Ball. Journal of Environmental Impact Assessment, 28, 471-482 (in Korean with English abstract).
4. Chungcheongnam-do, 2019, Comprehensive Planning Report for Small River Maintenance in Hoseong-gun. Chungcheongnam-do, 202 p (in Korean).
5. Drago, R.S., 1992, Physical Methods for Chemists, 2nd Edition. Saunders College Publishing, 750 p.