Carlson, John B.; Benjamin D. Keen (1996). "MZM: A monetary aggregate for the 1990s?"(PDF). Economic Review. 32 (2). Federal Reserve Bank of Cleveland: 15–23. Archived from the original(PDF) on 4 September 2012. Retrieved 2 April 2013.
Carlson, John B.; Benjamin D. Keen (1996). "MZM: A monetary aggregate for the 1990s?"(PDF). Economic Review. 32 (2). Federal Reserve Bank of Cleveland: 15–23. Archived from the original(PDF) on 4 September 2012. Retrieved 2 April 2013.