1. Bry, G., Boschan, C., 1971. Cyclical analysis of time series: Selected procedures and computer programs, Technical Paper 20, NBER. Columbia University Press.
2. Scoring the leading indicators;Diebold;Journal of Business,1989
3. Diebold, F.X., Lee, J.-H., Weinbac, G.C., 1994. Regime switching with time-varying transition probabilities. In: Colin Hargreaves (Ed.), Nonstationary Time Series Analysis and Cointegration. Oxford University Press, Oxford, UK, pp. 283–302.
4. Business cycle phases and their transition dynamics;Filardo;Journal of Business and Economic Statistics,1994
5. A new approach to the analysis of time series and the business cycle;Hamilton;Econometrica,1989