Baller M., Boorsma M., Frijters D.H, van Marwijk H.W, Nijpels G., van Hout H.P.  2010.  Depression in Dutch homes for the elderly: under-diagnosis in demented residents? Int J Geriatr Psychiatry. 25(7):712-8.

Boorsma M., Joling K.J, Frijters D.H, Ribbe M.E, Nijpels G., van Hout H.P.  2012.  The prevalence, incidence and risk factors for delirium in Dutch nursing homes and residential care homes. Int J Geriatr Psychiatry. 27(7):709-15.

Frijters D.H, Achterberg W.P.  2007.  [The ZZP Questionnaire. Reliability of a new resource utilization measure]. Tijdschr Gerontol Geriatr. 38(4):165-72.

Gerritsen D.L, Achterberg W.P, Steverink N., Pot A.M, Frijters D.H, Ribbe M.W.  2008.  The MDS Challenging Behavior Profile for long-term care. Aging & Mental Health. 12(1):116-23.

Gerritsen D.L, Steverink N., Frijters D.H, Hirdes J.P, Ooms M.E, Ribbe M.W.  2008.  A revised Index for Social Engagement for long-term care. Journal of Gerontological Nursing. 34(4):40-8.

Vaal J., Gussekloo J., de Klerk M.M, Frijters D.H, Evenhuis H.M, van Beek A.P, van Nispen R.M, Smits C., Deeg D.J.  2007.  [Combined vision and hearing impairment: in an estimated 30,000-35,000 people aged 55 years or over in The Netherlands].. Nederlands Tijdschrift voor Geneeskunde. 151(26):1459-63.

van der Steen J.T, Mitchell S.L, Frijters D.H, Kruse R.L, Ribbe M.W.  2007.  Prediction of 6-month mortality in nursing home residents with advanced dementia: validity of a risk score. Journal of the American Medical Directors Association. 8(7):464-8.

Volicer L., Frijters D.H, van der Steen J.T.  2012.  Relationship between symptoms of depression and agitation in nursing home residents with dementia. Int J Geriatr Psychiatry. 27(7):749-54.

Volicer L., Frijters D.H, van der Steen J.T.  2013.  Apathy and weight loss in nursing home residents: longitudinal study. J Am Med Dir Assoc. 14(6):417-20.