@article{article3cf717d7,
title   = {Focusing acoustic beams with a ball-shaped lens beyond the diffraction Limit},
author = {Lopes, J. H. and Leao-Neto, J. P. and Minin, I. V. and Silva, G. T. and Andrade, Marco Aurélio Brizzotti and Adamowski, Júlio Cezar},
year = {2017},
doi = {10.1103/PhysRevApplied.8.024013},
journal   = {PHYSICAL REVIEW APPLIED}
}