1. American Association on Intellectual and Developmental Disabilities http://www.aaidd.org/index.cfm
2. American Psychiatric Association http://www.dsm5.org/Pages/Default.aspx
3. Visual pedagogy in dentistry for children with autism;Bäckman;ASDC Journal of Dentistry for Children,1999
4. Attitudes of the dental team to the provision of care for people with learning disabilities;Bedi;Special Care in Dentistry,2001
5. Long-term effects of a course on dental care for handicapped persons;Bedi;Journal of Dental Education,1989