1. Suboptimal state estimation for continuous-time nonlinear system from discrete noisy measurement;Athans;IEEE Trans. Automatic Control,1968
2. Dynamical systems theory applied to long-term temperature and precipitation time series;Berndtsson,1994
3. Bras, R. L., , I., Rodriguez-Iturbe, , Random Functions and Hydrology, 1-559 Addison-Wesley, Reading, Mass., 1985,
4. Bray, R. J., , R. E., Loughhead, , Sunspots, Chapman and Hall, London, 1964,
5. Solar cycle 22 to be one of the largest on record?;Brown;Nature,1988