@article{acta2009,
	Title = {A theory of ultimately periodic languages and automata with an application to time granularity},
	Author = {Bresolin, Davide and Montanari, Angelo and Puppis, Gabriele},
	Journal = {Acta Informatica},
	Note = {DOI 10.1007/s00236-009-0094-7},
	Number = {5},
	Pages = {331--360},
	Url = {http://dx.doi.org/10.1007/s00236-009-0094-7},
	Volume = {46},
	Year = {2009},
}