Aliprantis, Charalambos D.; Brown, Donald J.; Burkinshaw, Owen (April 1988). "5 The overlapping generations model (pp. 229–271)". Existence and optimality of competitive equilibria (1990 student ed.). Berlin: Springer-Verlag. pp. xii+284. ISBN3-540-52866-0. MR1075992.
Douglas, Paul H.; Hamilton, Earl J.; Fisher, Irving; King, Willford I.; Graham, Frank D.; Whittlesey, Charles R. (July 1939), A Program for Monetary Reform(PDF), (draft proposal – scanned image)., archived from the original(PDF) on 2011-07-26
"FISHER SEES STOCKS PERMANENTLY HIGH; Yale Economist Tells Purchasing Agents Increased Earnings Justify Rise. SAYS TRUSTS AID SALES Finds Special Knowledge, Applied to Diversify Holdings, Shifts Risks for Clients". New York Times. October 16, 1929. p. 8. ProQuest104696595.
Douglas, Paul H.; Hamilton, Earl J.; Fisher, Irving; King, Willford I.; Graham, Frank D.; Whittlesey, Charles R. (July 1939), A Program for Monetary Reform(PDF), (draft proposal – scanned image)., archived from the original(PDF) on 2011-07-26