Christian Günther, “The polysymplectic Hamiltonian formalism in field theory and calculus of variations. I. The local case”, J. Differential Geom., 25, no. 1, 1987
J. J. Sinou, F. Thouverez, L. Jézéquel, “Methods to reduce non-linear mechanical systems for instability computation”, ARCO, 11, no. 3, 2004, 257
Malcolm R. Adams, Clint McCrory, Theodore Shifrin, Robert Varley, 1462, Singularity Theory and its Applications, 1991, 1
Jack Kuipers, Daniel Waltner, Martha Gutiérrez, Klaus Richter, “The semiclassical continuity equation for open chaotic systems”, Nonlinearity, 22, no. 8, 2009, 1945
M. B. Sevryuk, “Reversible linear systems and their versal deformations”, J Math Sci, 60, no. 5, 1992, 1663
Claudia Wulff, Andreas Schebesch, “Numerical Continuation of Hamiltonian Relative Periodic Orbits”, J Nonlinear Sci, 18, no. 4, 2008, 343
H�seyin Ko�ak, “Quadratic integrals of linear Hamiltonian systems”, Monatshefte f�r Mathematik, 98, no. 1, 1984, 53
N. W. Evans, “Superintegrability in classical mechanics”, Phys. Rev. A, 41, no. 10, 1990, 5666
S. Albeverio, P. Šeba, “Wave chaos in quantum systems with point interaction”, J Stat Phys, 64, no. 1-2, 1991, 369
A. A. Skovoroda, “Relationship between the shape of equilibrium magnetic surfaces and the magnetic field strength”, Plasma Phys. Rep., 33, no. 7, 2007, 523