Modulflächen quadratischer Diskriminante
Tài liệu tham khảo
van der Geer: Hilbert modular surfaces. Berlin Heidelberg New York: Springer 1987
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Ueno, K.: On fibre spaces of normally polarized abelian varieties of dimension 2. J. Fac.Sci. Univ. of Tokyo sec. IA, 18 (1971)
Zagier, D.: Nombres de classes et fractions continues. Asterisque 24–25, 81–97 (1975)