FORMULATION OF AN AGE STRUCTURED POPULATION MODEL AND ITS REDUCTION TO A MODEL WITH DELAY. Pesquimat, [S. l.], v. 10, n. 1, 2007. DOI: 10.15381/pes.v10i1.9420. Disponível em: https://revistasinvestigacion.unmsm.edu.pe/index.php/matema/article/view/9420.. Acesso em: 5 may. 2024.