Ali zear fadel sekee, Ashraf Nizar Awad Faraj, Khladoun Saadi Abboud Zenki, Ali Ahmed Zoied Freih, Noor safaa abd Mahdi, and Huda sattar masikh zbalah, “Design of Heart Rate Device That Measures Oxygen Level by Using an Arduino”, EJRDI, vol. 34, pp. 276–292, Jul. 2024.