1. A'Campo, N.: La fonction zêta d'une monodromie. Comment. Math. Helvetici50, 233?248 (1975)
2. Bogomolov, F.: Unstable vector bundles and curves on surfaces. Proc. Intern. Congress of Maths, Helsinki, pp. 517?524 (1978)
3. Deligne, P.: Théorie de Hodge II, Pub. Math. I.H.E.S.40, 5?57 (1972)
4. Deligne, P.: Séminaire Bourbaki. Exposé543 (1979)
5. Griffiths, P., Harris, J.: Principles of algebraic geometry. New York: Wiley Interscience publication 1978