Ramachandra, K. (1995). Simplest, Quickest and Self-Contained Proof that1/2≤θ≤1(θ Being the Least Upper Bound of the Real Parts of the Zeros of ζ(s)). The Journal of the Indian Mathematical Society, 61(1-2), 7–12. Retrieved from https://informaticsjournals.com/index.php/jims/article/view/21860