Gasanenko, V. A. “On the Asymptotics of the Sojourn Probability of a Poisson Process Between Two Nonlinear Boundaries That Move Away from One Another”. Ukrains’kyi Matematychnyi Zhurnal 53, no. 1 (January 25, 2001): 14–22. Accessed February 17, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/4216.