@article{rolnik_seleghim jr._2002,  title={On-site calibration of a phase fraction meter by an inverse technique},  volume={24},  ISSN={0100-7386},  url={https://doi.org/10.1590/S0100-73862002000400003},  DOI={10.1590/S0100-73862002000400003},  number={4},  journal={Journal of the Brazilian Society of Mechanical Sciences},  publisher={The Brazilian Society of Mechanical Sciences},  author={Rolnik, V. P. and Seleghim Jr., P.},  year={2002},  month={Nov},  pages={266–270} }