1. Group actions on fibered 3-manifolds;Edmonds;Comment. Math. Helv.,1983
2. A report on harmonic maps;Eells;Bull. London math. Soc.,1978
3. Least area incompressible surfaces in 3-manifolds;Freedman;Invent. Math.,1983
4. Knots and periodic transformation, topology of 3-manifolds;Fox,1962