1. ADA, Americans with Disabilities Act of 1990, US Public Law (1990) 101–336.
2. The Timeless Way of Building;Alexander,1979
3. A Pattern Language: Towns, Buildings, Construction;Alexander,1977
4. A structure for user oriented dialogues in computer aided telephony;Brownsey;Interacting with Computers,1994
5. eEurope—eAccessibility—user participation: participation of people with disabilities and older people in the Information Society;Buhler,2002