1. Benettin, G., Galgani, L., Giorgilli, A. and Strelcyn, J. M.: 1980, ‘Lyapunov characteristic exponents for smooth dynamical systems; a method for computing all of them’, Meccanica 15, Part I, theory, 9–20 — Part 2: Numerical applications, —21–30.
2. Contopoulos, G. and Voglis, N.: 1997, ‘A fast method for distinguishing between order and chaotic orbits’, Astr. Astrophys. 317, 73–82.
3. Froeschlé, C.: 1970, ‘A numerical study of the stochasticity of dynamical systems with two degrees of freedom’, Astr. Astrophys. 9, 15–23.
4. Froeschlé, C.: 1971, ‘On the number of isolating integrals in systems with three degrees of freedom’, Astrophys. Space Sci. 14, 110.
5. Froeschlé, C.: 1972, ‘Numerical study of a four-dimensional mapping’, Aste. Astrophys. 16, 172.