Greenburg, John L. (1995). "Isaac Newton and the Problem of the Earth's Shape". History of Exact Sciences. Springer. 49 (4): 371-391. doi:10.1007/BF00374704. JSTOR41134011.
Greenburg, John L. (1995). "Isaac Newton and the Problem of the Earth's Shape". History of Exact Sciences. Springer. 49 (4): 371-391. doi:10.1007/BF00374704. JSTOR41134011.