Zhang, Yinghui, Dong Zheng, Rui Guo, and Qinglan Zhao. 2018. “Fine-Grained Access Control Systems Suitable for Resource-Constrained Users in Cloud Computing”. Computing and Informatics 37 (2):327-48. http://147.213.75.17/ojs/index.php/cai/article/view/2018_2_327.