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The symmetry of the Kepler problem, the inverse Ligon-Schaaf mapping and the Birkhoff conjecture
Ligon TS
(2018)
The symmetry of the Kepler problem, the inverse Ligon-Schaaf mapping and the Birkhoff conjecture.
PLOS ONE 13(9): e0203821.
https://doi.org/10.1371/journal.pone.0203821