@article{silva_neff_lima_rocha neto_2011,  title={Hammer impact test applied for fouling detection in pipelines},  volume={22},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592011000600007},  DOI={10.1590/S0103-17592011000600007},  number={6},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Silva, Jaidilson Jó da and Neff, Franz Helmut and Lima, Antonio Marcus Nogueira and Rocha Neto, José Sérgio da},  year={2011},  month={Nov},  pages={620–630} }