@article{05312535,
title = {Periodic orbits with least period three on the circle.},
journal = {Fixed Point Theory and Applications [electronic only]},
volume = {2008},
year = {2008},
doi = {10.1155/2008/194875},
zbl = {1144.37434},
language = {en},
url = {http://dml.mathdoc.fr/item/05312535}
}
Zhao, Xuezhi. Periodic orbits with least period three on the circle.. Fixed Point Theory and Applications [electronic only], Tome 2008 (2008) . doi : 10.1155/2008/194875. http://gdmltest.u-ga.fr/item/05312535/