@article{barbosa_nader_higuti_kitano_silva_2010,  title={A simple interferometric method to measure the calibration factor and displacement amplification in piezoelectric flextensional actuators},  volume={21},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592010000600003},  DOI={10.1590/S0103-17592010000600003},  number={6},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Barbosa, Francisco de Assis Andrade and Nader, Gilder and Higuti, Ricardo Tokio and Kitano, Cláudio and Silva, Emílio Carlos Nelli},  year={2010},  month={Nov},  pages={577–587} }