Zhang, Hanqing, Enmiao Feng, and Haisheng Lian. “A Privacy-Preserving Federated Learning Framework for Healthcare Big Data Analytics in Multi-Cloud Environments”. Spectrum of Research 4, no. 1 (May 16, 2024). Accessed October 29, 2026. https://spectrumofresearch.com/index.php/sr/article/view/14.