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2. EGA A. Grothendieck and J. Dieudonné, Eléments de géométrie algébrique, ch. I: Springer-Verlag, 1971; ch. II to IV: Publ. Math. IHES, Paris.
3. R. Hartshorne, Complete Intersections in Characteristic p>0, (to appear in Amer. J. Math.).
4. P. Samuel, Méthodes d'algébre abstraite en géométrie algébrique, Springer-Verlag, 1967.