曲面の不正則数Igusa, Jun-ichi (1955), “A fundamental inequality in the theory of Picard varieties”, Proceedings of the National Academy of Sciences of the United
ヒルベルトスキームIDDOC=252601 Fogarty, John (1973), “Algebraic families on an algebraic surface. II. The Picard scheme of the punctual Hilbert scheme”, American Journal of Mathematics