S. SHANMUGASUNDARAM; S. CHITRA. Time Dependent Solution of M/M/C Feedback Queue With Catastrophes. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 3 - A, p. 63–72, 2016. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/972. Acesso em: 22 sep. 2025.