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3613 Roelof Bruggeman: Fourier coefficients of automorphic forms. 
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Roelof Bruggeman: Modular forms of varying weight I-III.
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8364 Roelof Bruggeman: Automorphic forms, hyperfunction cohomology, and
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17929 Daniel Bump: Automorphic forms and representations.
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23156 Rolf Busam/Eberhard Freitag: Hans Maaß. Jber. DMV 101 (1999), 135-150.

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27330 Henri Cohen/Fredrik Strömberg: Modular forms - a classical approach.
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3367 Harvey Cohn: Approach to Markoff's minimal forms through modular

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3507 Erich Hecke: Lectures on Dirichlet series, modular functions, and 
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3610 Willem Kuijk/Jean-Pierre Serre (ed.): Modular functions of one 
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"Dieses vorzügliche und (vor allem für Darstellungs- und Zahlentheoretiker)
willkommene Buch von höchstem mathematischen Niveau gibt eine Einführung
in die Kohomologie der Drinfeldmoduln (einer Verallgemeinerung von
Shimuravarietäten für Funktionenkörper statt Zahlkörper) ... "
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23759 Peter Lax/Ralph Phillips: Scattering theory for automorphic functions.
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3585 Joseph Lehner: Discontinuous groups and automorphic functions.
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3269 Toshitsune Miyake: Modular forms. Springer 1989.

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27307 Julia Müller: On the genesis of Robert P. Langland's conjectures and
his letter to Andre' Weil. Bull. AMS ... (2018), 36p.

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Morris Newman: Classification of normal subgroups of the modular group.
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8351 Morris Newman: Integral matrices. Academic Press 1973.

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Gives in great detail the correspondence between modular forms and Dirichlet 
series having appropriate functional equations, as well as an excellent 
presentation of the theory of theta series with spherical polynomial 
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1888 A. Ogg: Diophantine equations and modular forms.
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8246 Hans Opolka: Theta functions and communication theory.
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1757 Hans Petersson: Modulfunktionen und quadratische Formen.
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Henri Poincare': Les fonctions fuchsiennes et l'arithemtique.
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4715 Peter Sarnak: Some applications of modular forms.
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18910 Nils Scheithauer: Lie algebras and automorphic forms.
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3543 Bruno Schoeneberg: Elliptic modular functions. Springer 1974.

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25899 A. Scholl: Modular forms and algebraic K-theory. Internet ca. 1992, 13p.

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5353 Goro Shimura: Modular forms of half integral weight. 3608 Kuijk, 57-74.

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