8[1]Sun Lijun,Hachiya Yoshitaga,Yao Zukang.Concrete Pavement Layer Moduli Based on Stable Deflection.Journal of Materials.Concrete Structure & Pavements,JSCE,1995-11.
9[2]Dieter Stolle,Dave Hein.Parameter Estimates of Pavement Structure Layers and Uniqueness of the Solution,nondestructive testing of pavements and backcaculation of moduli,STP1026,1989.
10[3]Uzan J,Lytton R L,Germann F P.General Procedure for Backcalculating Layer Moduli,nondestructive testing of pavements and backcaculation of moduli,STP1026,1989.
