1. Time series analysis: forecasting and control;Box,1976
2. Modelling nonlinear economic relationships;Granger,1993
3. The accuracy of extrapolation (time series) methods: results of a forecasting competition;Makridakis;Journal of Forecasting,1982
4. An introduction to bilinear time series models;Granger,1978
5. Threshold autoregression, limit cycles and cyclical data;Tong;Journal of Royal Statistical Society, B,1980