Research and Implementation of Role-Based RBAC Administration Model. - Jiong Qiu; Chen-hua Ma; Jianwei Yin; Jinxiang Dong (CIT, 2005)

A flexible access control model for workflows. - Jiong Qiu; Chen-hua Ma (CSCWD, 2008)

An authorization model for collaborative access control. - Chen-hua Ma; Guo-Dong Lu; Jiong Qiu (J. Zhejiang Univ. Sci. C, 2010)