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. https://informaticsjournals.co.in/index.php/jims/article/view/21860.