Kadankov, V. F., and T. V. Kadankova. “On the Distribution of the Time of the First Exit from an Interval and the Value of a Jump over the Boundary for Processes With Independent Increments and Random Walks”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 57, no. 10, Oct. 2005, pp. 1359–1384, https://umj.imath.kiev.ua/index.php/umj/article/view/3691.