BARZANTI, L.; CORRADI, C. A stable iterative algorithm for evaluation of upper and lower approximations to ultimate ruin probabilities. Statistica, [S. l.], v. 63, n. 1, p. 13–21, 2003. DOI: 10.6092/issn.1973-2201/1232. Disponível em: https://rivista-statistica.unibo.it/article/view/1232. Acesso em: 26 oct. 2021.