Duarte , Ismael, Bruna Santos, Paola Campos, and Jandecy Junior. 2018. “Didactic Prototype for Spectral Signature Identification and Vibrations in Small Equipment (183-187)”. ITEGAM-JETIA 4 (15), 183-87. http://br940.teste.website/~itegamjetia/journal/index.php/jetia/article/view/376.