1. ITRF2000: A new release of the International Terrestrial Reference Frame for earth science applications
2. Least-Squares Fitting of Two 3-D Point Sets
3. Awange, JL and Grafarend, EW. 2005.Solving algebraic computational problems in geodesy and geoinformatics, 333Berlin: Springer.
4. Badekas, J. (1969).Investigations related to the establishment of a world geodetic system. Columbus, OH: Department of Geodetic Science, The Ohio State University, Report no. 124