E. Stringer, Y. Yesilada, and S. Harper. HT '07: Proceedings of the 18th conference on Hypertext and hypermedia, page 33--34. New York, NY, USA, ACM, (2007)
E. Michailidou, S. Harper, and S. Bechhofer. Assets '08: Proceedings of the 10th international ACM SIGACCESS conference on Computers and accessibility, page 121--128. New York, NY, USA, ACM, (October 2008)
G. Mbipom, and S. Harper. SIGDOC '09: Proceedings of the 27th ACM international conference on Design of communication, page 37--44. New York, NY, USA, ACM, (October 2009)
G. Mbipom, and S. Harper. The proceedings of the 13th international ACM SIGACCESS conference on Computers and accessibility, page 147--154. New York, NY, USA, ACM, (October 2011)