3Chopra M B,Dargush G F.Finite-element analysis of time-dependent large-deformation problems[].International Journal for Numerical and Analytical Methods in Geomechanics.1992
4CARTER J P,RANDOLPH M F,WROTH C P.Stress and pore pressure changes in clay during and after the expansion of cylindrical cavity [J]. Int J for Num and Analy Meth in Geomech, 1979,3(2) :305--322.