Pavlis, Nikolaos K.; Holmes, Simon A.; Kenyon, Steve C.; Factor, John K. (April 2012). "The development and evaluation of the Earth Gravitational Model 2008 (EGM2008)". Journal of Geophysical Research: Solid Earth. 117 (B4). Bibcode:2012JGRB..117.4406P. doi:10.1029/2011JB008916.
Pavlis, Nikolaos K.; Holmes, Simon A.; Kenyon, Steve C.; Factor, John K. (April 2012). "The development and evaluation of the Earth Gravitational Model 2008 (EGM2008)". Journal of Geophysical Research: Solid Earth. 117 (B4). Bibcode:2012JGRB..117.4406P. doi:10.1029/2011JB008916.
Lemoine, F. G., 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, E. C. Pavlis, R. H. Rapp and T. R. Olson (1998). The Development of the Joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) Geopotential Model EGM96. NASA/TP-1998-206861, July 1998. Partly available online.