@article{articlec68c9d57,
title   = {Ultrasonic sensor for the presence of oily contaminants in water},
author = {Franco Guzmán, Édiguer Enrique and Buiochi, Flávio and Adamowski, Júlio Cezar},
year = {2012},
doi = {10.15446/dyna.v81n188.41105},
journal   = {Dyna}
}