M. Bhargava, Congruence preservation and polynomial functions from Zn to Zm, Discrete Mathematics, vol.173, issue.1-3, pp.15-21, 1997.
DOI : 10.1016/S0012-365X(96)00093-3

P. Cégielski, S. Grigorieff, and I. Guessarian, Newton representation of functions over natural integers having integral difference ratios, International Journal of Number Theory, vol.11, issue.07, pp.2109-2139, 2015.
DOI : 10.1142/S179304211550092X

Z. Chen, On polynomial functions from Z n to Z m , Discrete Math, pp.137-145, 1995.

Z. Chen, On polynomial functions from Z n1 × Z n2 × · · ·× Z nr to Z m , Discrete Math, pp.67-76, 1996.

G. Pólya and . Uber-ganzwertige-ganze-funktionen, Ueber ganzwertige ganze funktionen, Rendiconti del Circolo Matematico di Palermo, vol.40, issue.1, pp.1-16, 1915.
DOI : 10.1007/BF03014836