1. Smithsonian Institution Standard Earth III;Gaposchkin;Smithsonian Astrophysical Observatory Special Report,1973
2. Lumped geopotential coefficients C15.15 and S15.15 obtained from resonant variation in the orbit of Ariel 3;Gooding;Nature Phys. Sci.,1971
3. Evaluation of 14th-order harmonics in the geopotential from 18 resonant satellite orbits;Harwood,1993
4. Individual geopotential harmonic coefficients of order 15 from 30 resonant satellite orbit analyses;Harwood,1994
5. Tesseral harmonic coefficients of order 30 from 14 resonant satellite orbit analyses;Harwood;Bulletin Geodesique,1994