Bursa, M., J.Kouba., M.Kumar, A.Muller., K.Radej, S.A.Ture (1999), GEOIDAL GEOPOTENTIAL AND WORLD HEIGHT SYSTEM, Studia geophysics et Geodaetica, 43(4), 327-337.
Center for Space Research, The University of Texas at Austin (2003), GGM 02 Notes, Retrieved November, 2004, from http://www.csr.utexas.edu/grace/gravity/
Featherstone, W. E.(2003), Software for computing five existing types of deterministically modified integration kernel for gravimetric geoid determination, Computers & Geosciences, 29, 183-193.
Förste, C., EFlechtner, R.Schmidt, U.Meyer, R. Stubenvoll, EBarthelmes, R. König, K.H.Neumayer, M.Rothacher, Ch.Reigber, R.Biancale, S.Bruinsma,, J.-M.Lemoine, and J.C.Raimondo (2005), A New High Resolution Global Gravity Field Model Derived From Combination of GRACE and CHAMP Mission and Altimetry/Gravimetry Surface Gravity Data, EGU General Assembly 2005, Vienna, Austria, 24-29, April 2005, Retrieved May, 2005, from http://www.gfz-potsdam.de/pb1/op/grace/index_GRACE.html