@article{chen2017JCTA,
title = "Power series with coefficients from a finite set",
journal = "Journal of Combinatorial Theory, Series A",
volume = "151",
pages = "241 - 253",
year = "2017",
issn = "0097-3165",
doi = "https://doi.org/10.1016/j.jcta.2017.05.002",
url = "http://www.sciencedirect.com/science/article/pii/S0097316517300602",
author = "Jason P. Bell and Shaoshi Chen",
keywords = "Power series, Szeg?'s theorem, D-finiteness, Integer points",
abstract = "We prove in this paper that a multivariate D-finite power series with coefficients from 
a finite set is rational. This generalizes a rationality theorem of van der Poorten and Shparlinski in 1996."
}