1. Space Research II;Truszynski,1961
2. The Orbit of Ariel 2 (1964-15A)—The first twelve months;Gooding;R.A.E. Technical Report No. 65274,1965
3. The orbital elements of Ariel 1 for April–August, 1962 and a comparison of R.A.E. and N.A.S.A ephemerides
4. Dynamics of Satellites;Merson,1963
5. R. H. Gooding, Modifications to the model for satellite orbits used in R.A.E. orbit determination, Unpublished Ministry of Aviation Report.