El Mrabet, Azzedine, et al. “Proposed Architecture for Hospital 4.0: Integrating IoT, Edge AI, and Blockchain for Secure and Efficient Healthcare Systems”. International Journal of Online and Biomedical Engineering (iJOE), vol. 21, no. 05, Apr. 2025, pp. pp. 87-102, doi:10.3991/ijoe.v21i05.52991.