Khatab, E., Ahmed, A., Hamed, A. (2013). Analysis of Earth’s Geopotential and its Effect on GPS Orbits. test, 15(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 15 – May 28 - 30, 2013), 1-7. doi: 10.21608/asat.2013.22214
E. H. Khatab; A. A. Ahmed; A. R. Hamed. "Analysis of Earth’s Geopotential and its Effect on GPS Orbits". test, 15, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 15 – May 28 - 30, 2013, 2013, 1-7. doi: 10.21608/asat.2013.22214
Khatab, E., Ahmed, A., Hamed, A. (2013). 'Analysis of Earth’s Geopotential and its Effect on GPS Orbits', test, 15(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 15 – May 28 - 30, 2013), pp. 1-7. doi: 10.21608/asat.2013.22214
Khatab, E., Ahmed, A., Hamed, A. Analysis of Earth’s Geopotential and its Effect on GPS Orbits. test, 2013; 15(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 15 – May 28 - 30, 2013): 1-7. doi: 10.21608/asat.2013.22214