RANCANG BANGUN ALAT FETAL DOPPLER BERBASIS IoT. Biomedical and Environmental Health Technology, [S. l.], v. 1, n. 2, p. 24–29, 2025. DOI: 10.35328/1v33r773. Disponível em: https://jurnal.ikta.ac.id/biohealth/article/view/2868. Acesso em: 4 jun. 2026.