1. Brouwer, D. and Clemence, G.M.: 1961, Methods of Celestial Mechanics, Academic Press.
2. Moulton, F.R.: 1958, Differential Equations, Dover.
3. Scheeres, D.J.: 1994, Dynamics about uniformly rotating tri-axial ellipsoids, Icarus, 110, 225–238.
4. Scheeres, D.J.: 1995, Analysis of orbital motion around 433 Eros, J. Astronautical Sciences, 43, 427–452.
5. Scheeres, D.J., Ostro, S.J., Hudson, R.S. and Werner, R.A.: 1996, Orbits close to asteroid 4769 Castalia, Icarus, 121, 67–87.