@article {156486,
	title = {In-situ GPR test for three-dimensional mapping of the dielectric constant in a rock mass},
	journal = {Journal of Applied Geophysics },
	volume = {146},
	year = {2017},
	pages = {1-15},
	author = {M. Elkarmoty and C. Colla and E. Gabrielli and P. Papeschi and S. Bondu{\`a} and R. Bruno}
}
