6Johansen, S. and K, Juselius. Maximum Likelihood Estimation and Inference on Cointegration with Applications to the Demand for Money. Oxford Bulletin of Economics and Statistics, 1990,52 (2): 169-254.
7Triffin, R. National Central Banking and the international economy, in Foreign Trade and Finance: Essays in International Economic Equilibrium and Adjustment. Allen and Allen (Eds.). New York, Macmillan, 1947.
8Triffin, R,. Gold and the Dollar Crisis. 2- nd Edition, New Haven, Yale University Press, 1961.