1. Reid, M., On Bogomolov's theorem, Mimeo'd Notes.
2. Bombieri, E., Canonical Models of Surfaces of General Type Publ. Math. I.H.E.S. 42 (1973) pp. 447–495.
3. Surgery on Simply-Connected Manifolds;Browder,1972
4. On Severi's Conjecture concerning simply-connected algebraic surfaces;Dolgacev;Soviet Math, Doklady,1966
5. Durfee, A., Fourteen characterizations of rational double points (Preprint).