A lower bound for the zeros of Riemann's zeta function on the critical line
Séminaire Bourbaki : vol. 1974/75, exposés 453-470, Séminaire Bourbaki, no. 17 (1976), Exposé no. 465, 7 p. 
@incollection{SB_1974-1975__17__176_0,
     author = {Bombieri, Enrico},
     title = {A lower bound for the zeros of Riemann's zeta function on the critical line},
     booktitle = {S\'eminaire Bourbaki : vol. 1974/75, expos\'es 453-470},
     author = {Collectif},
     series = {S\'eminaire Bourbaki},
     note = {talk:465},
     publisher = {Springer-Verlag},
     number = {17},
     year = {1976},
     zbl = {0326.10034},
     mrnumber = {444585},
     language = {en},
     url = {archive.numdam.org/item/SB_1974-1975__17__176_0/}
}
Bombieri, Enrico. A lower bound for the zeros of Riemann's zeta function on the critical line, dans Séminaire Bourbaki : vol. 1974/75, exposés 453-470, Séminaire Bourbaki, no. 17 (1976), Exposé no. 465, 7 p. http://archive.numdam.org/item/SB_1974-1975__17__176_0/

[1] G.H. Hardy - Sur les zeros de la fonction ζ(s) de Riemann, Comptes Rendus, 158 (1914), 1012-1014. | JFM 45.0716.04

[2] G.H. Hardy and J.E. Littlewood - The zeros of Riemann's zeta-function on the critical line, Math. Zeit., 10 (1921), 283-317. | EuDML 167645 | JFM 48.0344.03 | MR 1544477

[3] C.L. Siegel - Ueber Riemann's Nachlass zur analytischen Zahlentheorie, Quellen und Studien zur Gesch. der Math., Astr. und Phys., 2 (1932), 45-80. | JFM 58.1037.07

[4] A. Selberg - On the zeros of Riemann's zeta-function, Skr. Norske Vid. Akad. Oslo (1942), n° 10, 1-59. | MR 10712 | Zbl 0028.11101

[5] N. Levinson - More than One Third of Zeros of Riemann's Zeta-Function are on σ = 1/2 , Advances in Math., 13 (1974), 383-436. | MR 564081 | Zbl 0281.10017