NORKIN, B. V. On the solution of the basic integral equation of actuarial mathematics by the method of successive approximations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 12, p. 1689–1698, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3422. Acesso em: 5 dec. 2025.