@article{01930056,
title = {Time-symmetric cycles.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2003},
year = {2003},
pages = {1683-1692},
doi = {10.1155/S0161171203208097},
zbl = {1016.37018},
language = {en},
url = {http://dml.mathdoc.fr/item/01930056}
}
Bernhardt, Chris. Time-symmetric cycles.. International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 1683-1692. doi : 10.1155/S0161171203208097. http://gdmltest.u-ga.fr/item/01930056/