XiaoX.-Y., and YinH.-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), 240-56. https://umj.imath.kiev.ua/index.php/umj/article/view/1689.