W. Heber Green,G. A. Ampt.Studies on Soil Phyics.[J].The Journal of Agricultural Science,1911(1).
H. Rahardjo,T. H. Ong,R. B. Rezaur,E. C. Leong.Factors Controlling Instability of Homogeneous Soil Slopes under Rainfall[J].Journal of Geotechnical and Geoenvironmental Engineering,2007.