1. M. Marmot, Fair society, healthy lives, in Inequalities in Health: Concepts, Measures, and Ethics, (New York: Oxford University Press, 2013), p. 282
2. S. Häfner et al., To live alone and to be depressed, an alarming combination for the renin–angiotensin–aldosterone-system (RAAS). Psychoneuroendocrinology 37(2), 230–237 (2012)
3. K. Kinsella, J. Beard, R. Suzman, Can populations age better, not just live longer? Generations 37(1), 19–26 (2013)
4. K. Raworth, A safe and just space for humanity: can we live within the doughnut. Oxfam Policy Pract. Clim. Change Resilience 8(1), 1–26 (2012)
5. TIME—Living alone—solitary living. http://content.time.com/time/magazine/article/0,9171,2108055,00.html