problème à deux corps
1962 / The Kepler and Rutherford Problems: A Geometrical Treatment / D. L. Livesey / American Journal of Physics 30 (1962) p. 629 [doi]
1996 / Exactly how did Newton deal with his planets? / S.K. Stein / The Mathematical Intelligencer 18 (1996) p. 6 [doi]
2003 / Mécanique spatiale : perturbations provoquées ou naturelles / Colonel Robert Genty / Bulletin de l'Union des Physiciens 852 (2003) p. 387 [lien]