1. Orey, M., et al (1994) Development efficiency and effectiveness of alternative platforms for intelligent tutoring for the mobile subscriber radiotelephone terminal. Computers and Education, 22(4) pp. 301–313.
2. Marshall, I. M., Samson, W. B. and Dugard, P. I. (1994) Courseware-How much will it cost to develop? in 2nd All Ireland Conference on the Teaching of Computing. Dublin, Ireland.
3. Jay, J. (1988) The CBT analyst. Journal of Computer-Based Instruction, 15(1) pp. 34–45.
4. Marshall, I. M., Samson, W. B. and Dugard, P. I. (1994) Multimedia courseware. Never mind the quality, how much will it cost to develop? in Proceedings of Association for Learning Technology 94. University of Hull, Hull.
5. Schooley, R. E. (1988) Computer-based training (CBT) cost estimating algorithm for courseware (CEAC), in Interservice Industry Training Systems Conference, Florida.