Y. Yesilada, S. Harper, und S. Eraslan. Proceedings of the 10th International Cross-Disciplinary Conference on Web Accessibility, Seite 30:1--30:4. New York, NY, USA, ACM, (2013)
S. Harper, und Y. Yesilada. Handbook of Research on Personal Autonomy Technologies and Disability Informatics, 1, Kapitel 11, IGI Global, 1st Edition, (Mai 2011)