| Addressing the Corrections Crisis with Software Technology (2010) | Patricia O’Hagan, Edward Hanna, Core Systems and Roy Sterritt, University of Ulster. IEEE Computer Magazine, Pages 90-93. |
| Interfacing with Next Generation Tagging and Tracking Systems for Prisons and Correctional Facilities (2010) | Catherine McFarland, Roy Sterritt, Patricia O’Hagan, Edward Hanna, University of Ulster, Core Systems, 2010. |
| Tagging and Tracking System for Prisons and Correctional Facilities – A Design Roadmap (2008) | Mulholland CL, Sterritt R, OHagan P, Hanna E, Proceedings of Fifth IEEE International Workshop on Engineering of Autonomic and Autonomous Systems (ease 2008), Belfast, Northern Ireland, 31st March – 4th April, IEEE CS Press, Pages 143-153 |
