1. 5. Kwiatkowski D. , Phillips P.C.B. , Schmidt P. . Testing the null hypothesis of stationarity against the alternative of a unit root: How sure are we that economic time series have a unit root? Manuscript, 1990.
2. Structural time series analysis and modelling package: A review
3. Forecasting economic time series with structural and Box- Jenkins models: A case study (with discussion);Harvey;Journal of Business and Economic Statistics,1983