Sawai, N., K. Takara, and K. Kobayashi. “Evaluation of Water Retention Capacity and Flood Control Function of the Forest Catchment”. Future of Food: Journal on Food, Agriculture and Society, Vol. 1, no. 1, Feb. 2019, pp. 13-21, http://thefutureoffoodjournal.com/index.php/FOFJ/article/view/144.