Abdul Halim AH, Abdul Halim MH, Usman S, mohd daud salwani. Implementation of IoT and Blockchain for Temperature Monitoring in Covid19 Vaccine Cold Chain Logistics. OIJI [Internet]. 2021 Jun. 26 [cited 2024 Nov. 22];9(1):78-87. Available from: https://oiji.utm.my/index.php/oiji/article/view/4