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.

van Dijk P.T, Mehr D.R, Ooms M.E, Madsen R., Petroski G., Frijters D.H, Pot A.M, Ribbe M.W.  2005.  Comorbidity and 1-year mortality risks in nursing home residents. J Am Geriatr Soc. 53(4):660-5.

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.

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.

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.

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

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.

Bos J.T, Frijters D.H, Wagner C., Carpenter G.I, Finne-Soveri H., Topinkova E., Garms-Homolova V., Henrard J.C, Jonsson P.V, Sorbye L. et al..  2007.  Variations in quality of Home Care between sites across Europe, as measured by Home Care Quality Indicators. Aging-Clinical & Experimental Research. 19(4):323-9.

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.

Hirdes J.P, Ljunggren G., Morris J.N, Frijters D.H, Finne-Soveri H., Gray L., Bjorkgren M., Gilgen R..  2008.  Reliability of the interRAI suite of assessment instruments: a 12-country study of an integrated health information system. BMC Health Services Research. 8:277.

Boorsma M., van Hout H.P, Frijters D.H, Ribbe M.W, Nijpels G..  2008.  The cost-effectiveness of a new disease management model for frail elderly living in homes for the elderly, design of a cluster randomized controlled clinical trial. BMC Health Serv Res. 8:143.

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.

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.