@article{article201b791c,
title   = {Ultrasonic material characterization using diffraction-free PVDF receivers},
author = {Adamowski, Júlio Cezar and Buiochi, Flávio and Higuti, Ricardo Tokio},
year = {2010},
doi = {10.1016/j.phpro.2010.01.076},
journal   = {Physics Procedia}
}