D. V. Gusak, “On the Exit of One Class of Random Walks from an Interval”, Ukr. Mat. Zhurn., vol. 57, no. 9, pp. 1209–1217, Sep. 2005, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3679