@article{article4979acfc,
title   = {GPR for mapping fractures and as a guide for the extraction of ornamental granite from a quarry: a case study from southern Brazil},
author = {Porsani, Jorge Luís and Sauck, William A and Souza Júnior, Abad Oliveira},
year = {2006},
doi = {10.1016/j.jappgeo.2005.05.010},
journal   = {Journal of Applied Geophysics}
}