Silva, R., 		Alves, G., 		Silva, W., 		Souza, I., 		Santana, B., & 		Oliveira, F.
(2018).
 Development of a Low Cost Digital Stream Using Arduino and Ultrasonic Sensor.
In <em>Proceedings of the 18th Regional School of Computing Bahia, Alagoas, and Sergipe</em>, (pp. 141-146). Porto Alegre: SBC.