+ \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.
+ \bibitem{alder2}
+ B. J. Alder, T. E. Wainwright.
+ J. Chem. Phys. 31 (1959) 459.
+ \bibitem{stillinger_weber}
+ F. H. Stillinger, T. A. Weber.
+ Phys. Rev. B 31 (1985) 5262.
+ \bibitem{tersoff_silicon1}
+ J. Tersoff.
+ Phys. Rev. Lett. 56 (1986) 632.
+ \bibitem{tersoff_silicon2}
+ J. Tersoff.
+ Phys. Rev. B 37 (1988) 6991.
+ \bibitem{tersoff_silicon3}
+ J. Tersoff.
+ Phys. Rev. B 38 (1988) 9902.
+ \bibitem{tersoff_carbon}
+ J. Tersoff.
+ Phys. Rev. Lett. 61 (1988) 2879.
+ \bibitem{tersoff_multi}
+ J. Tersoff.
+ Phys. Rev. B 39 (1989) 5566.