-Butnor, J. R., Pruyn, M. L., Shaw, D. C., Harmon, M. E., Mucciardi, A. N., and Ryan, M. G., 2009. Detecting defects in conifers with ground penetrating radar: applications and challenges. Forest pathology, 39(5): 309-322.
-Bucur, V. 2003. Nondestructive Characterization and Imaging of Wood. Springer.
-Devaru, D., Halabe, U.B., Gopalakrishnan, B., Agrawal, S., and Grushecky Sh. (2005). Algorithm for detecting defects in wooden logs using ground penetrating radar. Intelligent Systems in Design and Manufacturing VI. 59990B.
-Goodman, D., and Piro, S. (2013). Basic Processing GPR. In: GPR Remote Sensing in Archaeology. 37-62.
-Halabe, U. B., Agrawal, S., and Gopalakrishnan, B., 2009. Nondestructive evaluation of wooden logs using ground penetrating radar. Nondestructive Testing and Evaluation, 24(4): 329-346.
-Hellier, C. 2003. Handbook of Nondestructive Evaluation. McGraw-Hill.
-Hernandez, J. E., and Duwadi, S. R., 2000. A nondestructive impulse radar tomographic imaging system for timber structures. Public Roads, 64(3): Nov/Dec., No. 00-0558.
-Hoegh, K., Khazanovich, L., Dai, S., and Yu, T., 2015. Evaluating asphalt concrete air void variation via GPR antenna array data. Case Studies in Nondestructive Testing and Evaluation, 3: 27-33.
-Hübschen, G., Altpeter, I., Tschuncky, R., and Herrmann, H. G., 2016. Materials characterization using Nondestructive Evaluation (NDE) methods. Woodhead Publishing.
-Khakiev, Z., Shapovalov, V., Kruglikov, A., and Yavna, V., 2014. GPR determination of physical parameters of railway structural layers. Journal of Applied Geophysics, 106: 139-145.
-Kloiber, M., Tippner, J., Heřmánková, V., and Štainbruch, J., 2012. Comparison of results of measuring by current NDT methods with results obtained through a new device for wood mechanical resistance measuring. In: 8th Int. Con. Structural Analysis of Historical Constructions, October.
-Laurens, S., Balayssac, J. P., Rhazi, J., Klysz, G., and Arliguie, G., 2005. Non-destructive evaluation of concrete moisture by GPR: Experimental study and direct modeling. Materials and Structure, 38: 827–832.
-Lualdi, M., and Zanzi, L., 2002. GPR investigations to reconstruct the geometry of the wooden structures in historical buildings. In: Ninth International Conference on Ground Penetrating Radar, Vol. 4758: 63-68. April. International Society for Optics and Photonics.
-Madhoushi, M., Ebrahimi, S., Omidvar, A., 2021. Structural health assessment of a historical building by using in situ stress wave NDT: a case study in Iran. Cerne, 27: e-102535.
-Madhoushi, M., 2016. Species and mechanical strengths of wood members in a historical timber building in Gorgan (North of Iran). BioResources, 11(2): 5169-5180.
-Madhoushi, M., Hatefnia, H., Ebrahimi, Gh., and Amini, N., 2017. Application of GPR technique in evaluation of internal defects in hardwood species. Iranian Journal of Wood and Paper Industries, 8(2): 225-239.
-Martínez-Sala, R., Rodríguez-Abad, I., Barra, R. D., and Capuz-Lladró, R., 2013. Assessment of the dielectric anisotropy in timber using the nondestructive GPR technique. Construction and Building Materials, 38: 903-911.
-Martinho, E., and Dionísio, A., 2014. Main geophysical techniques used for non-destructive evaluation in cultural built heritage: a review. Journal of Geophysics and Engineering, 11: 053001.
-Muller, W. (2003). Timber girder inspection using ground penetrating radar. Insight-Non-Destructive Testing and Condition Monitoring, 45(12): 809-812.
-Reci, H., Maï, T. C., Sbartaï, Z.M., Pajewski, L., and Kiri, E., 2016. Non-destructive evaluation of moisture content in wood using ground-penetrating radar. Geoscientific Instrumentation, Methods and Data Systems, 5(2): 575-581.
-Riggio, M., Anthony, R. W., Augelli, F., Kasal, B., Lechner, T., Muller, W., and Tannert, T., 2014. In situ assessment of structural timber using non-destructive techniques. Materials and Structures, 47(5): Sbartaï, M. (2010). Ground penetrating radar. In: In Situ Assessment of Structural Timber. 25-37. Springer, Dordrecht.
-Rodríguez-Abad, I., Martínez Sala, R. M., García García, F., and Capuz Lladró, R., 2010. Non-destructive methodologies for the evaluation of moisture content in sawn timber structures: ground-penetrating radar and ultrasound techniques. Near Surface Geophysics. 8(6): 475-482.
-Schultz, J. J., 2007. Using ground-penetrating radar to locate clandestine graves of homicide victims: forming forensic archaeology partnerships with law enforcement. Homicide Studies.
-Senalik, Ch. A., Wacker, J., Wang, X., and Jalinoos, F., 2016. Assessing the ability of ground-penetrating radar to detect fungal decay in Douglas-fir beams. In: 25th Research Symposium, New Orleans: 110-116. Columbus, OH: American Society for Nondestructive Testing, Forest Products Laboratory.
-Xu, X., Peng, S., Xia, Y., and Ji, W., 2014. The development of a multi-channel GPR system for roadbed damage detection. Microelectronics Journal, 45(11): 1542-1555.
)