1. Abraham, R. and Marsden, J. E., Foundations of Mechanics, 2nd ed., rev. and enl., Reading, Mass.: Benjamin/Cummings, 1978.
2. Encyclopaedia Math. Sci.;V. I. Arnol’d,2006
3. Bates, L. and Zou, M., Degeneration of Hamiltonian Monodromy Cycles, Nonlinearity, 1993, vol. 6, no. 2, pp. 313–335.
4. Appl. Math. Sci.;H. Broer,2011
5. Buchanan, D., Trojan Satellites (Limiting Case), Trans. Roy. Soc. Canada Sect. III, 1941, vol. 35, pp. 9–25.