Shenk, Michael. "Economic Activity : Dating a Recession and Predicting Its Demise," in Federal Reserve Bank of Cleveland. "Economic Trends - February 2009," Economic Trends (Federal Reserve Bank of Cleveland) (February 2009) : 20-22. https://fraser.stlouisfed.org/title/3952/item/493064/toc/505198 , accessed on April 23, 2024.