1. G. N. Duboshin, Celestial Mechanics: Basic Problems and Methods (Defense Tech. Inf. Center, Fort Belvoir, 1969).
2. K. V. Kholshevnikov, N. P. Pit’ev, and V. B. Titov, Attraction of Celestial Bodies (Sankt-Peterb. Gos. Univ., St. Petersburg, 2005).
3. R. A. Werner, “Spherical harmonic coefficients for the potential of a constant-density polyhedron,” Comput. Geoscie. 23 (10), 1071–1077 (1997).
4. R. A. Werner, “The gravitational potential of a homogeneous polyhedron or don’t cut corners,” Celestial Mech. Dyn. Astron. 59 (3), 253–278 (1994).
5. R. A. Werner and D. J. Scheeres, “Exterior gravitation of a polyhedron derived and compared with harmonic and mascon gravitation representations of asteroid 4769 Castalia,” Celestial Mech. Dyn. Astron. 65 (3), 313–344 (1996).