VIDAL, Jorge Eugenio. Research on the biology of the pneumococcus and pneumococcal diseases: the number one cause of death in children worldwide. Horizonte Sanitario, [S. l.], v. 16, n. 1, p. 5–7, 2017. DOI: 10.19136/hs.a16n1.1518. Disponível em: https://revistahorizonte.ujat.mx/index.php/horizonte/article/view/1518.. Acesso em: 16 apr. 2025.