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King (2005, p. 169). The calculations were as accurate as could be achieved under the limitations imposed by their assumption that the Earth was a perfect sphere.
Smith, Julius O. (2003). "Euler's Identity". Mathematics of the Discrete Fourier Transform (DFT). W3K Publishing. ISBN0-9745607-0-7. Archived from the original on 2006-09-15. Retrieved 2006-09-22.
Boyer, C. B. (1949). "Newton as an Originator of Polar Coordinates". American Mathematical Monthly. 56 (2). Mathematical Association of America: 73–78. doi:10.2307/2306162. JSTOR2306162.
Boyer, C. B. (1949). "Newton as an Originator of Polar Coordinates". American Mathematical Monthly. 56 (2). Mathematical Association of America: 73–78. doi:10.2307/2306162. JSTOR2306162.
Smith, Julius O. (2003). "Euler's Identity". Mathematics of the Discrete Fourier Transform (DFT). W3K Publishing. ISBN0-9745607-0-7. Archived from the original on 2006-09-15. Retrieved 2006-09-22.