@article{01930008,
title = {Closed orbits of },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2003},
year = {2003},
pages = {1047-1053},
doi = {10.1155/S0161171203208164},
zbl = {1016.37012},
language = {en},
url = {http://dml.mathdoc.fr/item/01930008}
}
Noorani, Mohd.Salmi Md. Closed orbits of . International Journal of Mathematics and Mathematical Sciences, Tome 2003 (2003) pp. 1047-1053. doi : 10.1155/S0161171203208164. http://gdmltest.u-ga.fr/item/01930008/