Graeme Baxter Bell,  "Strengthening CAPTCHA-based Web security".  First Monday,  17 (2-6): 33,  February  2012 .

Rosa Lin,  Shih-Yu Huang,  Graeme B. Bell,  and Yeuan-Kean Lee,  "A New CAPTCHA Interface Design for Mobile Devices".  In  Australasian User Interface Conference, Australasian Computer Science Week (ACSW2011), Perth, Australia, and to appear in the ACM digital library,    2011 .

Graeme B. Bell and  Yeuan-Kuen Lee,  "A method for automatic identification of signatures of steganography software".  IEEE Transactions on Information Forensics and Security,  5 (2): 354-358,  Jun  2010 .

Shih-Yu Huang,  Yeuan-Kuen Lee,  Graeme B. Bell,  and Zhan-he Ou,  "An Efficient Segmentation Algorithm for CAPTCHAs with Line Cluttering and Character Warping".  Multimedia Tools and Applications,  48 (2): 267-289,    2010 .

Shih-Yu Huang,  Yeuan-Kuen Lee,  Graeme B. Bell,  and Zhan-He Ou,  "A Projection-based Segmentation Algorithm for Breaking MSN and YAHOO CAPTCHAs".  In  Proceedings of the 2008 International Conference of Signal and Image Engineering (ICSIE'08), London, UK,  pages 1-.  Jul  2008 .

Graeme B. Bell and  Michael Livesey,  "The Existence of Local Minima in Local-Minimum-Free Potential Surfaces".  In  Towards Autonomous Robotic Systems (TAROS 2005), London, UK,    2005 .

Graeme B. Bell,  "Forward Chaining for Potential Field Based Navigation".  PhD thesis,  University of St Andrews,    2005 .

Graeme B. Bell and  Michael Weir,  "Agent Navigation Using Potential Fields and Forward Chaining".  In  PREP 2004 Postgraduate Research Conference in Electronics, Photonics, Communications and Networks and Computing Science.,    2004 .

Graeme B. Bell and  Michael Weir,  "Forward Chaining for Robot and Agent Navigation using Potential Fields".  In  27th Australasian Computer Science Conference (ACSC2004), Dunedin, New Zealand,    2004 .

Michael Weir and  Graeme B. Bell,  "The Incorporation of Intentional Action into Robots".  School of Computer Science, University of St Andrews,    2001 .