1. The Burnside problem and identities in groups;Adian,1979
2. The ubiquitous Prouhet-Thue–Morse sequence;Allouche,1999
3. Automatic Sequences: Theory, Applications, Generalizations;Allouche,2003
4. J. Berstel, Axel Thue’s work on repetitions in words, in: Leroux, Reutenauer (Eds.), Séries formelles et combinatoire algébrique, Publications du LaCIM, Université du Québec à Montréal, Montréal, 1992, pp. 65–80, See also Axel Thue’s papers on repetitions in words: A translation, Publications du LaCIM, Département de mathématiques et d’informatique, Université du Québec à Montréal, 20, 1995, p. 85
5. Partial words and a theorem of fine and wilf;Berstel;Theoret. Comput. Sci.,1999