1. Ananga, N, Sakurai, S. (1996): The Use of GPS Data for Improving Local Geoid Determination. Survey Review, Vol. 33. January 1996, pp. 334–338.
2. Cadek, O., Martinec, Z. (1991): Spherical Harmonic Expansion of the Earth’s Crustal Thickness up to Degree and Order 30. Studia geoph. Et geod. Vol. 35, pp. 151–165, 1991. (Used Degree and Order 70, personal communication)
3. Forsberg, R. (1984): A Study of Terrain Reductions, Density Anomalies and Geophysical Inversion Methods in Gravity Field Modelling. OSU Rep. No. 355, 1984.
4. Friedlieb, O.J., Featherstone, W.E., Dentith, M.C. (1997): A WGS84-AHD Profile over the Darling Fault, Western Australia. Geomatics Research Australiasia. No. 67, Dec, 1997, pp. 17–32.
5. Geiss, E. (1987): Die Lithosphäre im mediterranen Raum. Ein Beitrag zu Struktur, Schwerefeld und Deformation. DGK, Reihe C, Nr. 332, München 1987.