1. Apergis, N., & Elestherio, S. (2000). Measuring price elasticity of aggregate demand in Greece: 1961–1995. Public Finance Review, 28(5), 452–467 (September).
2. Fisher, I. (1911). The purchasing power of money: its determination and relation to credit, interest and crises. New York: MacMillan.
3. Friedman, M. (1971). Purchasing power bonds. Newsweek, April 12, 1971, p. 86.
4. Gambs, C. M. (1974). A note on macroeconomic textbooks: the use of the aggregate demand curve. Journal of Economic Literature, 12(3), 896–898 (September).
5. Gordon, R. J. (2003). Macroeconomics (9th ed.). Boston, MA: Addison-Wesley.