Korenovskyi, A. O., and R. V. Shanin. “On a Property of the Arithmetic Means of Monotonous Sequences”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 4 (June 12, 2022): 516 - 524. Accessed July 2, 2022. https://umj.imath.kiev.ua/index.php/umj/article/view/7151.