1. J Barrow-Green,Poincaré and the three body problem (American Mathematical Society, Providence, RI, 1997)
2. E N Lorenz,J. Atmos. Sci. 20, 130 (1963)
3. O E Rössler,Phys. Lett. A57, 397 (1976)
4. O E Rössler,Ann. (NY) Acad. Sci. 316, 376 (1979)
5. J Gleik,Chaos: Making a new science (Penguin Books, New York, 1987)