Mundell, R A (1962): “The Appropriate Use of Monetary and Fiscal Policy for Internal and External Stability”, International Monetary Fund Staff Papers 9, March, 70-76. As told by R Mundell to J Murray, Bank of Canada. BIS Review 90/2000  6  Canadian dollar at 92.5 cents (US).
Unfortunately, it took some time for academics and policymakers to appreciate the full implications of Mundell’s work.