1. Homological dimension of discrete groups;Bieri;Queen Mary College Mathematics Notes,1981
2. Cohomolgy of Groups;Brown,1982
3. Solvable groups of type A4;Čarin;Mat. Sb. (N.S.),1960
4. Homological Algebra;Cartan,1956
5. Rings with ascending condition on annihilators;Faith;Nagoya Math. J.,1966