SUVITHA , V. A Single Server Non-Markovian queue with K Phase of Vacation, Two Types of Services and an Optional Service. International Journal of Psychosocial Rehabilitation, [S. l.], v. 24, n. 4, p. 4933–4957, 2020. DOI: 10.61841/jd4tzq12. Disponível em: https://www.psychosocial.com/index.php/ijpr/article/view/5214. Acesso em: 19 jun. 2025.