Gusak, D. V. “On the Exit of One Class of Random Walks from an Interval”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 9 (September 25, 2005): 1209–1217. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3679.