Wei Nan, Nakajima, F., Tobino, T., (2019). Journal of Water and Environment Technology 17(3), 153-162. Japan Society on Water Environment, Tokyo, Japan. English language
Nakajima, F., Nishiyama, Y., Kawamura, E., Miyashita, K., Takayama, E., (1988). Research Bulletin of the Hokkaido National Agricultural Experiment Station(No. 150), 45-56. Japanese language