1. Benahmed Daho S.A. and J.D. Fairhead (2004). A new quasigeoid computation from gravity and GPS data in Algeria. Newton’s Bulletin No 2, A joint Bulletin of the Bureau Gravimétrique International and of the International Geoid Service – ISSN 1810-8547: pp 52–59.
2. Beutler G., H. Bock, E. Brockmann, R. Dach, P. Fridez, W. Gurtner, U. Hugentobler, D. Ineichen, J. Johnson, M. Meindl, L. Mervart, M. Rothacher, S. Schaer, T. Springer, and R. Weber (2001). Bernese GPS software version 4.2 manual, edited by U. Hugentobler, S. Schaer, and P. Fridez, Astron. Inst., University of Bern, Bern, p. 418.
3. Forsberg, R. and M.G. Sideris (1993). Geoid computation by multi-band spherical FFT approach, Manuscrita Geodetica, 18, 82–90.
4. Förste, C., F. Flechtner, R. Schmidt, R. König, U. Meyer, R. Stubenvoll, M. Rothacher, F. Barthelmes, K.H. Neumayer, R. Biancale, S. Bruinsma, and J.M. Lemoine (2006). A mean global gravity field model from the combination of satellite mission and altimetry/gravimetry surface gravity data. Geophys. Res. Abstr., 8, 03462.
5. Heiskanen W.A. and H. Moritz (1967). Physical geodesy. Freeman & Co., San Francisco.