1. H. EICHHORN (1974):Astronomy of Star Positions. F. Ungar Publ. Co., Inc., New York.
2. H. GOLDSTEIN (1950):Classical Mechanics. Addison-Wesley Publ. Co., Inc., Reading, Massachusetts.
3. E. GRAFAREND (1977): “Space-Time Differential Geodesy”,The Changing World of Geodetic Science, U.A. Uotila, ed., The Ohio State University Department of Geodetic Science Report No. 250.
4. W. HEISKANEN and H. MORITZ (1967):Physical Geodesy, W.H. Freeman and Co., San Francisco and London.
5. International Astronomical Union. (in press).Proceedings of the IAU Symposium No. 78 on Nutation and Earth Rotation, Kiev, May 23–28, 1977. Reidel Publishing Co., Dordrecht, Holland.