1. Homological Dimension of Discrete Groups;Bieri;Queen Mary College Mathematics Notes,1976
2. R. Bieri, W. Neumann and R. Strebel, Preprint, Universities of Frankfurt, Maryland and Heidelberg.
3. Cohomology of Groups;Brown,1982
4. FP∞ groups and HNN extensions;Brown;Bull. Amer. Math. Soc. (NS),1983
5. An infinite-dimensional torsion free FP∞ group;Brown;Inventiones Math.,1984