|Justice Trends Magazine 10th Edition (2023)
||Sir Tim Purcell, Head of Australasia, Core Systems, Justice Trends #10, pages 88-90
|Justice Trends Magazine 9th Edition (2022)
||Patricia O’Hagan, Core Systems and Jason Mereness, APPA Connect. Justice Trends Edition #9, pages 98-100
|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