KHAN, Z. A.; AKRAM, F.; AMIN, S.; ORAKZAI, M. S.; MUHAMMAD, A. M.; NASEER, Z. B.; ZOHAIB, A. .; BASHEER, Y.; QADEER, A. Design and Fabrication of Heart Rate and Oxygen Saturation Measurement Device using LED-LED Configuration and to Study Correlation of PPG Signal Amplitude with Breathing Rate . Pakistan Journal of Scientific Research, [S. l.], v. 3, n. 1, p. 113–118, 2023. DOI: 10.57041/vol3iss1pp113-118. Disponível em: https://pjosr.com/index.php/pjosr/article/view/968. Acesso em: 5 nov. 2025.