1. Andersson, F., Holzer, H.J., Lane, J.I., 2003. Worker advancement in the low-wage labor market: the importance of ‘good jobs’. [online] Oct 2003. [cited 2004 Feb 5]. Available from: URL: www.brookings.edu/es/urban/publications/200310_holzer.htm
2. Defining and characterizing the low-wage labor market;Bernstein,1999
3. Single mothers, poverty, and depression;Brown;Psychological Medicine,1997
4. Nursing Home Compare,2004
5. The price of stress;Cooper;Nursing Standard,1998