1. Antonucci, T. C., Sherman, A. M., & Akiyama, H. (1996). Social networks, support, and integration. In J. E. Birred (Ed.), Encyclopedia of gerontology (Vol. 2, pp. 502–515). New York: Academic Press.
2. Bajekal, M., Blane, D., Grewal, I., Karlsen, S., & Nazroo, J. (2004). Ethnic differences in influences on quality of life at older ages: A quantitative analysis. Ageing & Society, 24(5), 709–728.
3. Baorong, G., Pickard, J., & Jin, J. (2007). A cultural perspective on health outcomes of caregiving grandparents: Evidence from China. Journal of Intergenerational Relationships, 5(4), 25–40.
4. Bosworth, H. B., & Schaie, K. W. (1997). The relationship of social environment, social networks, and health outcomes in the Seattle longitudinal study: Analytical approaches. Journals of Gerontology: Series B: Psychological Sciences and Social Sciences, 52B, 197–205.
5. Carstensen, L. L. (1991). Socioemotional selectivity theory: Social activity in life-span context. Annual Review of Gerontology and Geriatrics, 11, 195–217.