ZHDANOVA, Yu. D. The classical ruin problem on a finite solvable group. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 3, p. 361–366, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5817. Acesso em: 14 apr. 2025.