8Willett, David A.,Mahboub, Kamayar C.,Rister, Brad.Accuracy of ground-penetrating radar for pavement-layer thickness analysis[].Journal of Transportation Engineering ASCE.2006
9E.G.Fernando.Development of a Radar Analysis Program for Layer Thickness Determinations,Research Report RF7257-1,Texas Transportation Institute,Texas A&M University,College Station,Texas,2000.