@article{CRMATH_2008__346_13-14_717_0,
     author = {Shaofang Hong and Yujuan Yang},
     title = {On the periodicity of an arithmetical function},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {717--721},
     year = {2008},
     publisher = {Elsevier},
     volume = {346},
     number = {13-14},
     doi = {10.1016/j.crma.2008.05.019},
     language = {en},
}