Baller M, Boorsma M, Frijiters D., Marwijk WJ, Nijpels G, Hout PJ.  2009.  Depression in Dutch Homes for the Elderly: under-diagnosis in demented residents? Int J Geriatr Psychiatry. 

Henrard J.C, Ankri J., Frijiters D., Carpenter I., Topinkova E., Garms-Homolova V., Finne-Soveri H., Jonsson P.JSorbye, Ljunggren G., Schroll M. et al..  2006.  Proposal of a service delivery integration index of home care for older persons: application in several European cities. Int J Integr Care. 6:e11.