Abdul Halim, Ahmad Helmi, Mohd Hizami Abdul Halim, Sahnius Usman, and salwani mohd daud. “Implementation of IoT and Blockchain for Temperature Monitoring in Covid19 Vaccine Cold Chain Logistics”. Open International Journal of Informatics 9, no. 1 (June 26, 2021): 78–87. Accessed November 22, 2024. https://oiji.utm.my/index.php/oiji/article/view/4.