A free boundary problem with a Stefan condition for a ratio-dependent predator-prey model. Uzbek Mathematical Journal, [S. l.], v. 69, n. 4, p. 83–95, 2025. DOI: 10.29229/uzmj.2025-4-9. Disponível em: https://uzmj.mathinst.uz/index.php/uzmj/article/view/110.. Acesso em: 4 dec. 2025.