Leitner, Yaron. "Liquidity and Exchanges, or Contracting with the Producers," in Federal Reserve Bank of Philadelphia. "First Quarter 2004," Business Review (Federal Reserve Bank of Philadelphia) (First Quarter 2004) : 16-22. https://fraser.stlouisfed.org/title/5580/item/557728/toc/522355 , accessed on April 25, 2024.