@article{arnold_oliveira_silva_dragoni sobrinho_runge_pires_2020,  title={Construction of a didactic system for wave propagation speed determination in liquids},  volume={42},  ISSN={1806-1117},  url={https://doi.org/10.1590/1806-9126-RBEF-2020-0239},  DOI={10.1590/1806-9126-RBEF-2020-0239},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Arnold, Francisco J. and Oliveira, João L. S. P. de and Silva, Alexandre P. and Dragoni Sobrinho, Geraldo and Runge, Cristhof J. R. and Pires, Marta S. G.},  year={2020},  pages={e20200239} }