@article{01348732,
title = {Higher order branching of periodic orbits from polynomial isochrones.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {1999},
year = {1999},
zbl = {0929.34031},
language = {en},
url = {http://dml.mathdoc.fr/item/01348732}
}
Toni, B. Higher order branching of periodic orbits from polynomial isochrones.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 1999 (1999) . http://gdmltest.u-ga.fr/item/01348732/