1. Topological groups and related structures;Arhangel'skii,2008
2. On Devaney's definition of chaos;Banks;Am. Math. Mon.,1992
3. Analysis on semigroups;Berglund,1989
4. Chaotic group actions;Cairns;Enseign. Math.,1995
5. Chaotic actions of free groups;Cairns;Nonlinearity,1996