1. Anderle, R. J., Malyevac, P. A., and Green, H. L. Jr.,: 1969, ‘Effect of Neglected Gravity Coefficients on Computed Satellite Orbits and Geodetic Parameters’, AIAA/AGUSymposium on Astrodynamics and Related Planetary Sciences, Washington, D.C., April 21–25.
2. Businger, P. and Golub, G. H.: 1968, Numerische Mathematik
7.
3. Coddington, E. A. and Levinson, N.: 1955, Theory of Ordinary Differential Equations, McGraw-Hill.
4. de Sulima, T. H.: 1970, ‘Houston Operations Predictor/Estimator (HOPE) Engineering Manual’, TRW Note No. 70-FMT-792, Houston, Texas.
5. Devine, C. J.: 1967, ‘JPL Development Ephemeris Number 19’, Technical Report 32–1181, Je Propulsion Laboratory, Pasadena, California.