Conyers, L.B. and Goodman, D., 1997, Ground-penetrating radar: an introduction for archaeologists: Altimira
Duke, S.K., 1990, Calibration of ground penetrating radar and calculation of attenuation and dielectric permitivity versus depth: MSc Thesis, Dept. of Geophysics, Colorado School of Mines, Golden
Egan, W. G. and Hilgeman, T. W., 1979, Optical properties of inhomogeneous materials: applications to geology, astronomy, chemistry and engineering: Academic Press, NY
