1. Breiter S, Wnuk E 1990: The estimation of radial, transverse and binormal geopotential perturbations for the orbits of some satellites,Celest. Mech. 48, 375.
2. Colombo O 1984: Altimetry, Orbits and Tides,NASA Techn. Memor. 86180, GSFC Greenbelt.
3. Engelis T 1987: Radial Orbit Error Reduction and Sea Surface Topography Determination Using Satellite Altimetry,Ohio State University Rep. # 377, DGSS, Columbus.
4. Kaula W M 1966:Theory of Satellite Geodesy, Blaisdell Publ Co., Waltham.
5. Klokočník J, Li H, Mueller H 1990:The German PAF for ERS-1: Investigation of Radial Orbit Error for ERS-1 by means of Rosborough's formulae, D-PAF/DGFI ERS-D-roe 31600, Techn. Rep. of Deutsche Geodaet. Forschungs Inst., Abt. 1, Műnchen.