A note on the shadowing lemma and symmetric periodic points
M. Dellnitz, I. Melbourne, Nonlinearity (1995) 1067–1075.
LibreCat: /record/16542
DOI: 10.1088/0951-7715/8/6/010

Generic bifurcation of Hamiltonian vector fields with symmetry
M. Dellnitz, I. Melbourne, J.E. Marsden, Nonlinearity (1992) 979–996.
LibreCat: /record/16548
DOI: 10.1088/0951-7715/5/4/008