1. Eitschberger, B. and Grafarend, E. W. (1974). Worlg geodetic datum WD 1 end WD2 from satellite and terrestrial observations. Bulletin Géodésique, 114:364–385.
2. Grafaxend, E.W. and Ardalan, A. A. (1997). W
0: an estimate in the Finnish height datum N60, epoch 193.4 from twenty-five GPS points of the Baltic Sea level project. Journal of Geodesy, 71:673–679.
3. Grafarend, E.W. and Ardalan, A. A. (1998). World Geodetic Datum 2000. In Rummel, R., editor, Towards and integrated global geodetic observing system. Munich, 5-9 October 1998.
4. Grafarend, E.W. and Ardalan, A. A. (1999). The form parameters of the Somigliana-Pizzetti level ellipsoid from current best estimates of fundamental geodetic parameters best on functional analytical review of the Somigliana-Pizzetti gravitational field. Journal of Geodesy. Under review.
5. Grafarend, E.W. and Engels, J. (1992a). A global representation of ellipsoidal heights — geoidal undulations or topographic heights — in terms of orthonormal functions, Parti: amplitude-modified spherical harmonics functions}. Manuscripta geodaetica, 17:52–58.