MathSciNet bibliographic data MR1611003 11F33 (11F75 11F80 11R23) Urban, Eric Module de congruences pour ${\rm GL}(2)$${\rm GL}(2)$ d'un corps imaginaire quadratique et théorie d'Iwasawa d'un corps CM biquadratique. (French) [Congruence module for ${\rm GL}(2)$${\rm GL}(2)$ of an imaginary quadratic field and Iwasawa theory of a biquadratic CM field] Duke Math. J. 92 (1998), no. 1, 179–220. Article

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