Melles, Heloisa Helena Barbosa, and Sueko Takimoto. “Frequency of Antibodies to Influenza Type C Virus in São Paulo City Dwellers”. Instituto Adolfo Lutz Journal - RIAL, vol. 42, no. 1-2, Dec. 1982, pp. 17-20, doi:10.53393/rial.1982.42.36773.