K. J. Arrow y G. Debreu. 1954. Existence of an equilibrium for a competitive economy. Econometrica 22:265–290. doi10.2307/1907353
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McKenzie, Lionel W. (1954). «On Equilibrium in Graham's Model of World Trade and Other Competitive Systems». Econometrica22 (2): 147-161. doi:10.2307/1907539.