1. Pension Benefit Guaranty Corporation (PBGC) (2012 a). Annual Report 2012. Washington, DC: PBGC. Available online at http://pbgc.gov/documents/2012-annual-report.pdf
2. Pension Benefit Guaranty Corporation (PBGC) (2012 b). FY 2012 Exposure Report. Washington, DC: PBGC. Available online at http://www.pbgc.gov/documents/2012-exposure-report.pdf
3. The Pension Crisis Revealed
4. U.S. Government Accountability Office (GAO) (2013). GAO's 2013 High-Risk Series: An Update. GAO-13-359 T. Washington, DC: GAO. Available online at http://www.gao.gov/assets/660/652166.pdf