1. The classification of Seifert fibred 3-orbifolds;Bonahon,1985
2. Varieties of group representations and splittings of 3-manifolds;Culler;Annals of Math.,1983
3. Finite group actions on homotopy 3-spheres;Davis,1984
4. Group actions on fibered 3-manifolds;Edmonds;Comm. Math. Helv.,1983
5. Varieties of groups and 3-manifolds;Evans;Topology,1973