JOHNSTON, Fay. Tropical influenza surveillance. Communicable Diseases Intelligence, [S. l.], v. 20, p. 282–283, 1996. DOI: 10.33321/cdi.1996.20.40. Disponível em: https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/237. Acesso em: 6 apr. 2026.