@article{articleba3f5168,
title   = {Isochronous and period doubling bifurcations of periodic solutions of non-integrable hamiltonian systems with reflexion symmetries},
author = {Aguiar, M A M and Malta, Coraci Pereira},
year = {1988},
doi = {10.1016/0167-2789(88)90029-2},
journal   = {Physica D}
}