SAMOILENKO, I. V. Asymptotic expansion of a semi-Markov random evolution. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 9, p. 1234–1248, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3524. Acesso em: 11 apr. 2025.