1. A. Selberg, “Contributions to the theory of the Riemann zeta-function,” Arch. Math. Naturvid. 48 (5), 89–155 (1946); Reprinted in Collected Papers (Springer-Verlag, Berlin, 1989), Vol. 1, pp. 214–280.
2. D. A. Goldston and S. M. Gonek, A Note on S(t) and the Zeros of the Riemann Zeta-Function, arxiv: math.NT/0511092v1.
3. A. Selberg, “The zeta-function and the Riemann hypothesis,” in C. R. Dixième Congrès Math. Skandinaves 1946 (Jul. Gjellerups Forlag, Copenhagen, 1947), pp. 187–200; reprinted in Collected Papers (Springer-Verlag, Berlin, 1989), Vol. 1, pp. 341–355.
4. K.-M. Tsang, The Distribution of the Values of the Riemann Zeta-Function, Ph.D. Thesis (Princeton Univ., Princeton, 1984).
5. R. N. Boyarinov, “On the distribution of the values of the Riemann zeta-function,” Dokl.Math. 83 (3), 290–292 (2011).