@article{sakamoto_souza_das-gupta_2001,  title={Electroactive properties of flexible piezoelectric composites},  volume={4},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392001000300010},  DOI={10.1590/S1516-14392001000300010},  number={3},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Sakamoto, Walter Katsumi and Souza, Edmilson de and Das-Gupta, Dilip K.},  year={2001},  month={Jul},  pages={201–204} }