3Black, Kevin and Kopac, Peter,"The Application of Ground-Penetrating Radar in Highway Engineering", Public Highway, Vol. 56 No. 3, December 1992, pp96-103.
4Scullion, T. and Saarenketo, T.,"Implementation of Ground Penetrating Radar Technology in Asphalt Pavement Testing", 9th International Conference on Asphalt Pavements, Copenhagen, Denmark, August, 2002.
5Saarenketo, T., and Scullion, T. (1995),"Using Electrical Properties to Classify the Strength Properties of Base Course Aggregates," Texas Transportation Institute, Report 1341-2, Texas Transportation Institute, College Station, Texas, Nov. 1995.
6Saarenketo, T. (1996),"Using GPR and Dielectric Probe Measurements in Pavement Density Quality Control," Transportation Research Board Record 1997, pp. 34-41.
7PANK 4122: Air Void Content of Asphalt Pavements: Ground Penetrating Radar Method. FNRA, 2000.
8Scullion, T., Lau, C.L., and Chen, Y. (1992),"Implementation of the Texas Ground Penetrating Radar System," Texas Transportation Institute, Report 1233-1, College Station, Texas, Nov.1992.
