Amin, Maher M., Mervat M. Refaat, and Abd-Elrahim Ruby. “Satellite-Only Versus Combined High Degree Global Geopotential Model Tailored to Gravity Field in Egypt, Using Integral Formulas”. IJRDO-Journal of Applied Science 3, no. 8 (August 31, 2017): 35-47. Accessed December 23, 2024. http://webdisk.ijrdo.org/index.php/as/article/view/1331.