PRESMAN, E. L. . Sonin’s inventory model with a long-run average cost functional. Eurasian Mathematical Journal, [S. l.], v. 16, n. 4, p. 76–94, 2025. Disponível em: https://emj.enu.kz/index.php/main/article/view/878. Acesso em: 5 jan. 2026.