Hwai Ing, Soon, Nur Fatihah Jamin, Thilaka Karunaniti, Nurfatihah Azman, Low Zhi Jian, Nur Farahiyah Mohammad, and Nashrul Fazli Mohd Nasir. “Development of Portable Oxygen Concentrator Device for COVID-19 Patient”. Multidisciplinary Applied Research and Innovation 2, no. 3 (December 9, 2021): 220–223. Accessed July 18, 2024. https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/5105.