Shah Hussain Badshah, Muhammad Imad, Muhammad Abul Hassan, Naimullah, Shabir khan, Farhatullah, Sana Ullah, and Syed Haider Ali. “Investigation of Blockchain for COVID-19: A Systematic Review, Applications and Possible Challenges”. EAI Endorsed Transactions on Smart Cities 7, no. 1 (March 23, 2023): e5. Accessed November 24, 2024. https://publications.eai.eu/index.php/sc/article/view/2827.