Hai, R., Li Zhi’an, J. Shuguang, P. Shaolin, Y. Zuoyue, and W. Zhengfeng. 2004. “Ecological Models for Rehabilitation of Degraded Hilly Lands in Southern China”. Uganda Journal of Agricultural Sciences 9 (1):312-19. http://journal.naro.go.ug/index.php/ujas/article/view/235.