Xiao, X.-Y., & Yin, H.-W. (2017). Еxact rates in the Davis – Gut law of iterated logarithm for the first
moment convergence of independent identically distributed random variables.
Ukrains’kyi Matematychnyi Zhurnal,
69(2), 240-256.
https://umj.imath.kiev.ua/index.php/umj/article/view/1689