___

• [1] Bertone, C. and Roggero, M., Positivity of Chern classes for reflexive sheaves in PN, preprint.
• [2] Fulton, W., Intersection theory, Springer, Berlin, 1984.
• [3] Hartshorne, R., Algebraic geometry, Springer, Berlin, 1977.
• [4] Hartshorne, R., Stable vector bundles of rank 2 on P3, Math. Ann., 238(1978), no. 3, 229-280.
• [5] Hartshorne, R., Stable reflexive sheaves, Math. Ann., 254(1980), no. 2, 121-176.
• [6] Okonek, C., Reflexive Garben auf P4, Math. Ann., 260(1982), no. 2, 211-237.
• [7] Siu, Y.-T. and Trautmann, G., Gap-sheaves and extensions of coherent analytic subsheaves, Springer, Berlin, 1971.