1. D. Brower and J. Clemence, "Methods in Celestial Mechanics" (Academic Press, New York, 1961).
2. C. Charlier, Die Mechanik des Himmels (de Gruyter, Leipzig, 1927, in German).
3. C. Murray and S. Dermott, "Solar System Dynamics" (Cambridge University Press, 2000).
4. NASA, Available online: URL https://ssd.jpl.nasa.gov/?planet_pos.
5. On the Distance Between two Ellipses in \(\mathbb{R}^3\)