Avellanas Complementary graphics of the paper of Arribas, M., Blesa, F. y Elipe, A. entitled "Quadratic Hamiltonians on non-symmetric Poisson structures". http://gme.unizar.es/pages/avellanas.html
Four examples of periodic orbits with 1000 digits of precision Examples of the paper: A. Abad, R. Barrio and A. Dena, 2011. Computing periodic orbits with arbitrary precision, Physical Review E. 84 - 016701 http://gme.unizar.es/pages/filesFPO/fourpoLHH12.html