1. Lagrange, J.: 1873,Oeuvres 6, Gauthier-Villars, Paris.
2. Mittleman, D.: 1979, ?Motion about the Stable Libration Points in the Linearized, Restricted 3-Body Problem?, NASA Reference Publication, February 1980.
3. Prigogine, I., Gregos, A., and George, Cl.: 1977,Celes. Mech. 16, 489.
4. Prigogine, I. et al.: 1978,Science 201, 777.
5. Szebehely, V.: 1967,Theory of Orbits, Academic Press, N.Y.