8Dickey, D.A. and Fuller, W.A., Distribution of the estimators ibr autoregressive time series with a unit root. Journal Of The American Statistical Associ- ation, No.74,1979.
9Helmut, L., Introduction To Muhiple Time Series Analysis. New York: Springer-Verlag, 1991.
10Kathryn, M. and Dominguez, E., Foreign re- serve management during the global financial crisis. Journal Of International Money And Finance, Vol.31, No.8,2012.