@article{franco_andrade_adamowski_buiochi_2011,  title={Acoustic beam modeling of ultrasonic transducers and arrays using the impulse response and the discrete representation methods},  volume={33},  ISSN={1678-5878},  url={https://doi.org/10.1590/S1678-58782011000400004},  DOI={10.1590/S1678-58782011000400004},  number={4},  journal={Journal of the Brazilian Society of Mechanical Sciences and Engineering},  publisher={Associação Brasileira de Engenharia e Ciências Mecânicas - ABCM},  author={Franco, Ediguer E. and Andrade, Marco A. B. and Adamowski, Julio C. and Buiochi, Flávio},  year={2011},  month={Oct},  pages={408–416} }