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|Holland, A.J., Hon, J., Huppert, F.A., Stevens, F. and Watson, P. (1998) A population-based study of the prevalence and presentation of dementia in adults with Down's syndrome. British Journal of Psychiatry, 172: 493-498

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|Ball, S.L., Holland, A.J., Huppert, F.A., Treppner, P., Watson, P. and Hon, J. (2004) The modified CAMDEX informant interview is a valid and reliable tool for use in the diagnosis of dementia in adults with Down's syndrome. Journal of Intellectual Disability Research, 48 (6): 611-620

|Ball, S.L., Holland, A.J., Hon, J., Huppert, F.A., Treppner, P. and Watson, P. (2006) Personalty and behaviour changes mark the early stages of Alzheimer’s disease in adults with Down’s syndrome: findings from a prospective population-based study. International Journal of Geriatric Psychiatry, 21 (7): 661-673