1. J. Berstel, Axel Thue’s papers on repetition in words: A translation, Publications du LaCIM, Université du Québec á Montréal 20, 1995
2. Combinatorics on words: A tutorial;Berstel;Bull. Eur. Assoc. Theor. Comput. Sci.,2003
3. Uniformly growing k-th power-free homomorphisms;Brandenburg;Theoret. Comput. Sci.,1983
4. On the repetitive threshold for large alphabets;Carpi,2006
5. Mutually avoiding ternary words of small exponent;Crochemore;Internat. J. Algebra Comput.,1991