1. Bateson, G. (1997). Geist und Natur. Eine notwendige Einheit (5. Aufl.). Frankfurt am Main: Suhrkamp (Suhrkamp Taschenbuch Wissenschaft, 691).
2. Cacioppo, J.T. & Hawkley, L.C. (2009). Perceived social isolation and cognition. Trends in Cognitive Sciences, 13(10), 447–454.
3. Cacioppo, J.T., Hawkley, L.C., Norman, G.J. & Berntson, G.G. (2011). Social isolation. Ann NY Acad Sci. 2011, 1231(1), 17–22.
4. Caspi, A., Harrington, H., Moffitt, T.E., Milne, B.J. & Poulton, R. (2006). Socially Isolated Children 20 Years Later: Risk of Cardiovascular Disease. Arch Pediatr Adolesc Med. 2006, 160(8), 805–811.
5. Costa, F. Braga da (2004). Homens invisíeis: relatos de uma humilhação social. Sao Paulo: Globo.