SHRESTHA, M. M.; ROPAKHETI, B.; BHATTARAI, U.; ADHIKARI, A.; THAKUR, S. Digital Ultrasonic Sensing Device with Programmable Frequency: Development and Analysis. Advances in Engineering and Technology: An International Journal, [S. l.], v. 1, n. 1, p. 33–45, 2021. DOI: 10.3126/aet.v1i1.39658. Disponível em: https://www.nepjol.info/index.php/aet/article/view/39658. Acesso em: 25 apr. 2024.