@ARTICLE{
author={Balibrea F,Bas-Linero A,Lopez-Soler G,Stevic Stevo},
year={2007},
title={Global periodicity of x(n+k+1) = f(k)(x+k)... f(2)(x(n+2))f(1)(xn+1)},
journal={JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS},
volume={13},
number={10},
pages={901-910},
document_type={Article},
}