1. Long-term speed and accuracy of Morse code vs. Head-pointer interface for text generation;Anson,2004
2. Accessibility - Apple,2017
3. Use Siri on Your IPhone, IPad, or IPod Touch - Apple Support,2017
4. Augmentative and Alternative Communication: Supporting Children and Adults with Complex Communication Needs;Beukelman,2013
5. Eye gaze performance for children with severe physical impairments using gaze-based assistive technology-A longitudinal study;Borgestig;Assistive Technology,2016