1. Aleshin, S.V.: Finite automata and Burnside’s problem for periodic groups. Math. Notes 11, 319–328 (1972)
2. Bartholdi, L.: The growth of Grigorchuk’s torsion group. Int. Math. Res. Notices 20, 1349–1356 (1998)
3. Bartholdi, L.: Lower bounds on the growth of a group acting on the binary rooted tree. Int. J. Algebra Comput. 11(1), 73–88 (2001)
4. Bartholdi, L., Erschler, A.: Growth of permutational extensions. Invent. Math. 189(2), 431–455 (2012)
5. Bartholdi, L., Erschler, A.: Groups of given intermediate word growth, arXiv: 1110.3650v1