Ardalan, A. A.; Karimi, R.; Grafarend, E. W. (2009). "A New Reference Equipotential Surface, and Reference Ellipsoid for the Planet Mars". Earth, Moon, and Planets. 106 (1): 1–13. doi:10.1007/s11038-009-9342-7. ISSN0167-9295. S2CID119952798.
Lowell, Percival (April 1902). "Areography". Proceedings of the American Philosophical Society. 41 (170): 225–234. JSTOR983554. Retrieved 27 July 2022.
merriam-webster.com
"Areography". Merriam-Webster.com. Retrieved 27 July 2022.
Ardalan, A. A.; Karimi, R.; Grafarend, E. W. (2009). "A New Reference Equipotential Surface, and Reference Ellipsoid for the Planet Mars". Earth, Moon, and Planets. 106 (1): 1–13. doi:10.1007/s11038-009-9342-7. ISSN0167-9295. S2CID119952798.
Ardalan, A. A.; Karimi, R.; Grafarend, E. W. (2009). "A New Reference Equipotential Surface, and Reference Ellipsoid for the Planet Mars". Earth, Moon, and Planets. 106 (1): 1–13. doi:10.1007/s11038-009-9342-7. ISSN0167-9295. S2CID119952798.