1. Computation in nilpotent groups (application);Bayes,1974
2. Groups of Prime Power Order, vol. 1;Berkovich,2008
3. Cohomology of Groups;Brown,1982
4. Atlas of Finite Groups. Maximal Subgroups and Ordinary Characters for Simple Groups;Conway,1985
5. On the relation between upper central quotients and lower central series of a group;Ellis;Trans. Amer. Math. Soc.,2001