R. H. Rapp, Y.M. Wang, and N.K. Pavlis, The Ohio state 1991 Geopotential and sea surface topography harmonic coefficients models, Report 410, Dpt. Geodetic Sci. Surveying, Ohio State University, columbus, Ohio, 1991.

R.S. Nerem et al., Gravity model development for TOPEX/POSEIDON: Joint gravity models 1 and 2, J. Geopys. Res. 99, 24421-24447, 1994.

F.G. Lemoine, N.K. Pavlis, S.C. Kenyon, R.H. Rapp, E.C. Pavlis, and B.F. Chao, New high-resolution modle developed for Earth' gravitational field, EOS, Transactions, AGU, 79, 9, March 3, No 113, 117-118, 1998.

F.G. Lemoine, S.C. Kenyon, J.K. Factor, R.G. Trimmer, N.K. Pavlis, D.S. Chinn, C.M. Cox, S.M. Klosko, S.B. Luthcke, M.H. Torrence, Y.M. Wang, R.G. Williamson, r.H. Rapp, and T.R. Olson, The development of the joint NASA/GSFC and the National Imagery and Mapping Agency (NIMA) geopotential models, EGM96, NASA, TP-1998-206861, 575 pp, July 1998.