Cacioppo, J.T., Hughes, M.E., Waite, L.J., et al. (2006). Loneliness as a specific risk factor for depressive symptoms: Cross-sectional and longitudinal analyses. Psychol Aging, 21(1), 140-151.
Gleckman, H. (2017). The Risks of Social Isolation for Older Adults. Forbes [https://www.forbes.com/sites/howardgleckman/2017/11/29/the-risks-of-social-isolation-for-older-adults/#4073d06015d3]
Holt-Lunstad, J., Smith, T.B., Baker, M., Harris, T., Stephenson, D. (2015). Loneliness and social isolation as risk factors for mortality: A meta-analytic review. Perspect Psychol Sci, 10(2), 227-37.
Lal, R., Pattanayak, R.D. (2017). National Drug Dependence Treatment Centre, Alcohol use among the elderly: Issues and considerations. Journal of Geriatric mental heath, 4(1), 4-10.
Legg, T.J. (2018). Life Review Therapy. Healthline. [https://www.healthline.com/health/life-review-therapy]