B.Natraj Kumar, M.Sri Lakshmi, and Dr S.Prem Kumar. “Investigation on Revocable Fine-Grained Access Control Scheme for Multi-Authority Cloud Storage Systems”. International Journal of Computer Engineering in Research Trends 2, no. 8 (August 31, 2015): 486–491. Accessed June 10, 2026. https://www.ijcert.org/index.php/ijcert/article/view/213.