@article{article002c6253,
title   = {GPR applied to mapping utilities along the route of the Line 4 (yellow) subway tunnel construction in São Paulo City, Brazil},
author = {Porsani, Jorge Luís and Ruy, Yang Boo and Ramos, Fernanda Pereira and Yamanouth, Gisele R. B},
year = {2012},
doi = {10.1016/j.jappgeo.2012.01.001},
journal   = {Journal of Applied Geophysics}
}