1. Arnold, V.l. (1976). Methodes Mathématiques de la Mécanique Céleste, Ed. de Moscou
2. Bailie, Ph., and Froeschlé, C. (1989). in Asteroids Comets Meteors III, Eds. Lagerkvist. Rickman, Lindblad, Lindgren, Uppsala Univ., pp. 231–234
3. Benettin, G., Galgani, L., Giorgilli, A., Strelcy, J.M. (1980) Meccanica p. 9–20, 21–30
4. Chirikov, B.V. (1979). Phys. Rep, 52, 263–379
5. Chirikov, B.V., Vecheslavov, V.V. (1986). Preprint