O. I. Stepanets, “Rate of convergence of a group of deviations on sets of $\bar{\psi}$−integrals”, Ukr. Mat. Zhurn., vol. 51, no. 12, pp. 1673–1693, Dec. 1999, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4771