1. Time Series: Theory and Methods;Brockwell,1991
2. Continuous time threshold autoregressive models;Brockwell;Statistica Sinica,1991
3. A multiple threshold AR(1) model;Chan;Journal of Applied Probability,1985
4. Introduction to the Theory of Random Processes;Gikhman,1969
5. Fitting a continuous time autoregression to discrete data;Jones,1981