Gusak, D. V. “Behavior of Classical Risk Processes After Ruin and a Multivariate Ruin Function”. Ukrains’kyi Matematychnyi Zhurnal 59, no. 10 (October 25, 2007): 1339–1352. Accessed April 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3393.