1. Amos MJ, Featherstone WE (2009) Unification of New Zealand’s local vertical datums: iterative gravimetric quasigeoid computations. J Geod 83:57–68. doi: 10.1007/s00190-008-0232-y
2. Ayhan ME (1993) Geoid determination in Turkey. Bulletin Géodésique 67(1):10–22. doi: 10.1007/BF00807293
3. Cannon JB (1929) Adjustment of the precise level net of Canada 1928. Geodetic Survey of Canada Special Publication No. 28. Department of Energy, Mines and Resources, Ottawa, Canada
4. Doi H, Yahagi T, Shirai Y, Ohtaki M, Saito T, Minato T, Chiba H, Inoue T, Sumiya K, Sugawara J, Tanaka Y, Saita H, Kojima H, Yutsudo T, Amagai T, Iwata M (2005) The revision of geodetic coordinates of control points associated with the Tokachi-oki Earthquake in 2003. J Geospatial Inform Authority Japan 108:1–10
5. Forsberg R (1987) A new covariance model for inertial gravimetry and gradiometry. J Geophys Res 92(B2):1305–1310