1. R. DEUTSCH: “Estimation Theory”, Prentice-Hall, Inc. 1965
2. Dept. of Geodetic Science Report;D. Hajela,1974
3. G. REED: “Application of Kinematical Geodesy for Determining the Short Wavelength Components of the Gravity Field by Satellite Gradiometry”. The Ohio State Research Foundation. Report No. 201, March 1973.
4. P. ARGENTIERO and R. GARZA-ROBLES: “On Estimating Gravity Anomalies From Gradiometer Data”. NASA/TN D-8286. February 1976.
5. Dept. of Geodetic Science Report;S. Gopalapillai,1974