1. P. A. Martin and J. Piasecki,J. Stat. Phys. 76:447 (1994).
2. W. Feller,An Introduction to Probability Theory and Its Applications (Wiley, New York, 1968).
3. J. E. Robinson,Phys. Rev. 83:678 (1951).
4. W. C. Saslaw,Gravitational Physics of Stellar and Galactic Systems (Cambridge University Press, Cambridge, 1987).