S. Harper, C. Goble, и S. Pettitt. Proceedings of the 10th International Conference on Human-Computer Interaction, 4, стр. 399--403. London, UK, Lawrence Erlbaum Associates, (2003)
S. Harper, и P. Green. International Conference on Computers Helping People with Special Needs, стр. 289--296. Germany, OCG Press, (июля 2000)Under the auspices of the UNESCO.
S. Harper. University of Manchester Institute of Science and Technology (UMIST), Manchester, UK, Master of Philosophy in Software Engineering, (сентября 1998)
P. Green, и S. Harper. International Conference on Computers Helping People with Special Needs, стр. 281--288. Germany, OCG Press, (июля 2000)Under the auspices of the UNESCO.