1. M. G. Benli and R. Grigorchuk,
Uncountably many 2-generated just-infinite branch pro-2 groups,
Algebra Discrete Math. 19 (2015), no. 1, 8–18.
2. K. S. Brown,
Cohomology of Groups,
Grad. Texts in Math. 87,
Springer, New York, 1994.
3. V. H. Dyson,
The word problem and residuallly finite groups,
Notices Amer. Math. Soc. 11 (1964), Paper No. 743.
4. V. H. Dyson,
A family of groups with nice word problems,
J. Aust. Math. Soc. 17 (1974), 414–425.
5. R. I. Grigorchuk,
Degrees of growth of finitely generated groups and the theory of invariant means,
Izv. Akad. Nauk SSSR Ser. Mat. 48 (1984), no. 5, 939–985.