1. Bank for International Settlements, 1997. Statistics on payment systems in the group of ten countries. Bank for International Settlements. Basle, Switzerland
2. Bauer, P.W., Bohn, J.B., Severance-Lossin, E., Hancock, D., 1997. Federal Reserve Cash Processing Efficiency. Mimeo. Board of Governors of the Federal Reserve System, Washington, DC
3. Scale Economies, Cost Efficiencies, and Technological Change in Federal Reserve Payments Processing
4. The efficiency of the Federal Reserve in providing check processing services