MatsakI. K., and PlichkoA. M. “One Moment Estimate for the Supremum of Normalized Sums in the Law of the Iterated Logarithm”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 58, no. 5, May 2006, pp. 653–665, https://umj.imath.kiev.ua/index.php/umj/article/view/3483.