4Nettles SM,Pleck JH. Risk, resilience, and development: The multiple ecologies of black adolescents in the United States. Ibid, New York: Cambridge University Press, 1994. 157
5Masten AS,Gewirtz AH. Vulnerability and resilience in early child development. McCartney K,Phillips D, Handbook of Early Childhood Development. New York: Blackwell, 2005.22--43