1. Bien,R.: 1978, Astron.Astrophys. 68, pp. 295–301.
2. Bien,R.: 1980a, Astron.Astrophys. 81, pp. 255–259.
3. Bien,R.: 1980b, Moon and Planets 22, pp. 163–166.
4. Brown,E.W. and Shook,C.A.: 1933, Planetary Theory, The University Press, Cambridge, pp. 250–288.
5. Chebotarev,G.A., Belyaev,N.A., and Eremenko,R.P.: 1974, The Stability of the Solar System and of Small Stellar Systems, Ed.: Y. Kozai, IAU Symp. No.62, pp.63–69.