1Chang D W, Yeh S H, Time - domain wave equation analyses of single piles utilizing tansformed radiation damping[J] Soils and Foundation, JGS, 1999,39(2):31-44.
2Zeng, X & Rajapakse, R. K. N.D. Dynamic axial load transfer from elastic bar to poroelastic medium[J]. Journal of Engineering Mechanics,ASCE, 1999,125(9) : 1048-1055.