Alzheimer's association Campaign for Quality Residential Care. (2006). Dementia Care Practice Recommendations for Assisted Living Residences and Nursing Homes. 平成27年10月15日現在. http://www.alz.org/care/overview.asp/ (2015年10月15日アクセス)
Chernev A. (2003). When more is less and more : The role of ideal point availability and assortment in consumer choice. Journal of Consumer Research 30 (2), 170-183.