Application of delay integral equations in population growth. Baghdad Science Journal, Iraq, Baghdad, v. 6, n. 2, p. 401–404, 2009. DOI: 10.21123/bsj.2009.6.2.401-404. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/996.. Acesso em: 18 jun. 2025.