Oktivasari, Prihatin, Riandini Riandini, Rahmah A. Fitri, and Sungguh I. Malaon. “Active Filter Analysis on Designing Electronic Stethoscope”. Jurnal Elektronika dan Telekomunikasi 19, no. 2 (December 31, 2019): 51–56. Accessed September 11, 2026. https://jurnalet.brin.go.id/jet/article/view/278.