P. S. RESHMI; K. P. JOSE. A queueing-inventory system with perishable items and retrial of customers. Malaya Journal of Matematik, India, v. 7, n. 02, p. 165–170, 2019. DOI: 10.26637/MJM0702/0006. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/695. Acesso em: 16 jul. 2024.