SALSABILAH. Alat Deteksi Jumlah Frekuensi Pernafasan Dengan Sensor Piezoelektrik. SinarFe7, [S. l.], v. 4, n. 1, p. 402–408, 2021. Disponível em: https://journal.fortei7.org/index.php/sinarFe7/article/view/119. Acesso em: 28 apr. 2024.