KE, J.-C.; CHANG, F.-M.; CHANG, C.-J. CONTROLLING ARRIVALS FOR A MARKOVIAN QUEUEING SYSTEM WITH A SECOND OPTIONAL SERVICE. International Journal of Industrial Engineering: Theory, Applications and Practice, [S. l.], v. 17, n. 1, 2009. DOI: 10.23055/ijietap.2010.17.1.19. Disponível em: https://journals.sfu.ca/ijietap/index.php/ijie/article/view/19. Acesso em: 8 may. 2024.