Rogers, H. H. (1973). "Symmetry transformations of the classical Kepler problem". Journal of Mathematical Physics. 14 (8): 1125–1129. Bibcode:1973JMP....14.1125R. doi:10.1063/1.1666448.
Lakshmanan, M.; Hasegawa H. (1984). "On the canonical equivalence of the Kepler problem in coordinate and momentum spaces". Journal of Physics A. 17 (16): L889 –L893. Bibcode:1984JPhA...17L.889L. doi:10.1088/0305-4470/17/16/006.
Lévy-Leblond, J. M. (1971). "Conservation Laws for Gauge-Invariant Lagrangians in Classical Mechanics". American Journal of Physics. 39 (5): 502–506. Bibcode:1971AmJPh..39..502L. doi:10.1119/1.1986202.
Gonzalez-Gascon, F. (1977). "Notes on the symmetries of systems of differential equations". Journal of Mathematical Physics. 18 (9): 1763–1767. Bibcode:1977JMP....18.1763G. doi:10.1063/1.523486.
Einstein, A. (1915). "Erklärung der Perihelbewegung des Merkur aus der allgemeinen Relativitätstheorie". Sitzungsberichte der Preussischen Akademie der Wissenschaften. 1915: 831–839. Bibcode:1915SPAW.......831E.
Hall 2013 Proposition 18.7; note that Hall uses a different normalization of the LRL vector. Hall, Brian C. (2013), Quantum Theory for Mathematicians, Graduate Texts in Mathematics, vol. 267, Springer, Bibcode:2013qtm..book.....H, ISBN978-1461471158.
Rogers, H. H. (1973). "Symmetry transformations of the classical Kepler problem". Journal of Mathematical Physics. 14 (8): 1125–1129. Bibcode:1973JMP....14.1125R. doi:10.1063/1.1666448.
Lakshmanan, M.; Hasegawa H. (1984). "On the canonical equivalence of the Kepler problem in coordinate and momentum spaces". Journal of Physics A. 17 (16): L889 –L893. Bibcode:1984JPhA...17L.889L. doi:10.1088/0305-4470/17/16/006.
Lévy-Leblond, J. M. (1971). "Conservation Laws for Gauge-Invariant Lagrangians in Classical Mechanics". American Journal of Physics. 39 (5): 502–506. Bibcode:1971AmJPh..39..502L. doi:10.1119/1.1986202.
Gonzalez-Gascon, F. (1977). "Notes on the symmetries of systems of differential equations". Journal of Mathematical Physics. 18 (9): 1763–1767. Bibcode:1977JMP....18.1763G. doi:10.1063/1.523486.