\addcontentsline{toc}{chapter}{References}
\begin{thebibliography}{99}
+ \bibitem{laplace}
+ P. S. de Laplace.
+ Th\'eorie analytique des probabilit\'es.
+ Oeuvres Compl\`etes de Laplace, volume VII.
+ Paris, 1820, Gauthier-Villars.
\bibitem{alder1}
B. J. Alder, T.E. Wainwright.
J. Chem. Phys. 27 (1957) 1208.