Pieper, M. J. C., van der Steen, J. T., Francke, A. L., Scherder, E. J. A., Twisk, J. W. R., Achterberg, W. P. 2018. Effects on pain of a stepwise multidisciplinary intervention (STA OP!) that targets pain and behavior in advanced dementia: A cluster randomized controlled trial. Palliat Med. 32 (3) 682-692.
Freeman, Shannon, Armstrong, Joshua J., Tyas, Suzanne L., Neufeld, Eva 2017. Clinical characteristics and patterns of health deficits of centenarians receiving home care and long-term care services. Exp Gerontol. 99 () 46-52.
Armstrong, J. J., Zhu, M., Hirdes, J. P., Stolee, P. 2012. K-means cluster analysis of rehabilitation service users in the Home Health Care System of Ontario: examining the heterogeneity of a complex geriatric population. Arch Phys Med Rehabil. 93 (12) 2198-205.
Huizing, Anna R, Hamers, Jan PH, Gulpers, Math JM, Berger, Martijn PF 2008. A cluster-randomized trial of an educational intervention to reduce the use of physical restraints with psychogeriatric nursing home residents. J Am Geriatr Soc. 57 (7) 75.
Frijters, D. H., Achterberg, W. P. 2007. [The ZZP Questionnaire. Reliability of a new resource utilization measure]. Tijdschr Gerontol Geriatr. 38 (4) 165-72.