1. Methods of Celestial Mechanics;Brouwer,1961
2. Physical conditions in the inner coma of comet P/Wirtanen;Crifo;Icarus,1997
3. Fundamentals of Celestial Mechanics;Danby,1988
4. Collisional evolution of Edgeworth-Kuiper Belt objects;Davis;Icarus,1997
5. An efficient integrator that uses Gauss-Radau spacings;Everhart,1985