RUZHEVICH, N. A. On a limit theorem for an additive functional on a nonrecurrent Markovian chain. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 2, p. 262–271, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5003. Acesso em: 7 apr. 2025.