MathSciNet bibliographic data MR2652902 11N05 (11M26 11Y35) Chao, Kuok Fai; Plymen, Roger A new bound for the smallest $x$$x$ with $\pi(x)>{\rm li}(x)$$\pi(x)>{\rm li}(x)$. Int. J. Number Theory 6 (2010), no. 3, 681–690. Article

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