1. Asmar, S., Konopliv, A., Bills, B., Park, R., Raymond, C., Russell, C., Smith, D., Zuber, M., 2009. Simulations of dawn gravity for Vesta and Ceres and implications for interior structure. In: AAS/Division for Planetary Sciences Meeting Abstracts, vol. 41, #50.01.
2. Asteroid density, porosity, and structure;Britt;Asteroids III,2002
3. The density and porosity of meteorites from the Vatican collection;Consolmagno;Meteoritics and Planetary Science,1998
4. Collisional history of asteroids: evidence from Vesta and the Hirayama families;Davis;Icarus,1985
5. Everhart, E., 1985. An efficient integrator that uses Gauss-Radau spacings. In: Carusi, A., Valsecchi, G.B. (Eds.), Dynamics of Comets: Their Origin and Evolution, Proceedings of IAU Colloq. 83, held in Rome, Italy, 11–15 June 1984, Dordrecht, Reidel, Astrophysics and Space Science Library, vol. 115, 1985, p. 185.