no. 4
On Siegel's zero
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 2 (1975) no. 4, pp. 571-583. 
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     author = {Goldfeld, Dorian M. and Schinzel, A.},
     title = {On {Siegel's} zero},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {571--583},
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Goldfeld, D. M.; Schinzel, A. On Siegel's zero. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 2 (1975) no. 4, pp. 571-583. http://www.numdam.org/item/ASNSP_1975_4_2_4_571_0/

[1] H. Davenport, Multiplicative Number Theory, Chicago, 1967. | MR 217022 | Zbl 0159.06303

[2] D. Goldfeld, An asymptotic formula relating the Siegel zero and the class number of quadratic fields, Ann. Scuola Normale Sup., this volume. | Numdam | MR 404212 | Zbl 0327.10042

[3] W. Hanecke, Über die reellen Nullstellen der Dirichletschen L-Reihen, Acta Arith., 22 (1973), pp. 391-421. | MR 318074 | Zbl 0262.10025

[4] A.E. Ingham, The Distribution of Prime Numbers, Cambridge, 1932. | Zbl 0006.39701

[5] B.W. Jones, The Arithmetic Theory of Quadratic Forms, Baltimore, 1950. | MR 37321

[6] S. Lang, Introduction to Diophantine Approximation., Reading, 1966. | MR 209227 | Zbl 0144.04005

[7] O. Perron, Die Lehre von den Kettenbrugchen, Band I, Basel-Stuttgart, 1954. | Zbl 0056.05901

[8] J. Pintz, Elementary methods in the theory of L- functions II, to appear in Acta Arithmetica. | Zbl 0307.10041

[9] K. Prachar, Primzahlverteilung, Berlin-Gottingen -Heidelberg, 1957. | MR 87685 | Zbl 0080.25901

[10] E. Titchmarsh, The zeta function, of Riemann, Cambridge, 1930. | JFM 56.0978.02