- Pourciau , Bruce . 1991 . On Newton's Proof That Inverse-Square Orbits Must be Conics . Annals of Science , 48 : 159 – 172 .
- Weinstock , Robert . 1989 . Long-buried dismantling of a centuries-old myth: Newton's Principia and inverse-square orbits . American Journal of Physics , 57 : 846 – 849 . and Robert Weinstock, ‘Dismantling a centuries-old myth: Newton's Principia and inverse square orbits', American Journal of Physics, 50 (1982), 610–17.
- Erlichson , Herman . 1990 . Comment on “Long-buried dismantling of a centuries-old myth: Newton's Principia and inverse-square orbits” by Robert Weinstock [Am. J. Phys., 57, 846–9 (1989)] . American Journal of Physics , 58 : 882 – 884 . and Herman Erlichson, ‘A Response to Robert H. Romer's “Editor's Note”’ [Am. J. Phys., 58, 882 (1990)], American Journal of Physics, 58, 886.
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica translated into English by Andrew Motte in 1729, revised by Florian Cajori (University of California Press, Berkeley and Los Angeles, 1934). All Principia references in this paper will be to the Cajori edition.
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica 14 – 14 .
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica 49 – 49 .
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica 52 – 52 .
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica 54 – 54 .
- Newton , I. 1687 . Philosophiae Naturalis Principia Mathematica 61 – 61 .
- Unfortunately, Pourciau makes no mention of Proposition XVII in his paper. Instead, he said ‘nobody aware of how much Newton knew about both conic sections and curvature would ever doubt that he could easily have given a geometric construction of the required conic’, and referred the reader to Book I, sections IV and V, of the Principia (Propositions XVIII to XXIX). Footnote 1, 164.
Annals of Science
Volume 49, 1992 - Issue 4