1. Allouche, J.P., Rampersad, N., Shallit, J.: Periodicity, repetitions, and orbits of an automatic sequence. Theoret. Comput. Sci. 410, 2795–2803 (2009)
2. Allouche, J.P., Shallit, J.: Automatic Sequences: Theory, Applications, Generalizations. Cambridge University Press (2003)
3. Allouche, J.P., Shallit, J.O.: The ubiquitous Prouhet-Thue-Morse sequence. In: Ding, C., Helleseth, T., Niederreiter, H. (eds.) Sequences and Their Applications, Proceedings of SETA 1998, pp. 1–16. Springer, Heidelberg (1999)
4. Berstel, J.: Axel Thue’s Papers on Repetitions in Words: a Translation, vol. 20. Publications du Laboratoire de Combinatoire et d’Informatique Mathématique, Université du Québec à Montréal (February 1995)
5. Bruyère, V., Hansel, G., Michaux, C., Villemaire, R.: Logic and p-recognizable sets of integers. Bull. Belgian Math. Soc. 1, 191–238 (1994); Corrigendum, Bull. Belg. Math. Soc. 1, 577 (1994)