8Mandelbort B B. The Fractal Geometry of Nature [M].New York: Freeman, 1983.
9Huang Guanhua, Zhang Renduo. Evaluation of soil water retention curve with the pore-solid fractal model[ J]. Geoderma, 2005, 127(1 -2): 52 -61.
10Hwang S 1/ , Powers S E. Using particle-size distribution models to estimate sol1 hydraulic properties[ J]. Soil Science Society of America Journal, 2003, 67(4) : 1103 - 1112.