1. Développement analytiques de l'inverse de la distance;Abu-El-Ata;Astron. Astrophys.,1974
2. The solar system for 200 million years;Applegate;Astron. J.,1986
3. Milankovitch and Climate,1984
4. Dynamical Systems;Birkhoff,1927
5. The Measurement of Power Spectra;Blackman,1958