1. Allan, G. (2008). Flexibility, friendship, and family. Personal Relationships, 15, 1–16.
2. Bauman, Z. (2003). Liquid love: On the frailty of human bonds. Polity Press.
3. Beck, U., & Beck-Gernsheim, E. (1995). The normal chaos of love. Polity Press.
4. Beck, U., & Beck-Gernsheim, E. (2002). Individualization. Sage.
5. Borell, K., & Karlsson, S. G. (2003). Reconceptualizing intimacy and ageing: Living apart together. In S. Arber, K. Davidson, & J. Ginn (Eds.), Gender and ageing: Changing roles and relationships (pp. 47–62). Open University Press.