KLIMENOK, Valentina I. Multi-server queueing system with reserve servers. Journal of the Belarusian State University. Mathematics and Informatics, [S. l.], n. 3, p. 57–70, 2019. DOI: 10.33581/2520-6508-2019-3-57-70. Disponível em: https://journals.bsu.by/index.php/mathematics/article/view/1046. Acesso em: 7 oct. 2026.