Fernando MoreuE. AyorindeJ. MasonCharles R. FarrarDavid Dennis Lee MascarenasRemote railroad bridge structural tap testing using aerial robots.67-8020182Int. J. Intell. Robotics Appl.1https://doi.org/10.1007/s41315-017-0041-7db/journals/ijira/ijira2.html#MoreuAMFM18