GUSAK, D. V. Behavior of risk processes with random premiums after ruin and a multivariate ruin function. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 11, p. 1473–1484, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3405. Acesso em: 6 dec. 2025.