1. On Burnside’s problem on periodic groups;Grigorčuk;Funktsional. Anal. i Prilozhen.,1980
2. On the Burnside problem for periodic groups;Gupta;Math. Z.,1983
3. Self-similar groups;Nekrashevych,2005
4. From fractal groups to fractal sets;Bartholdi,2003
5. Branch Groups;Bartholdi,2003