Emission factors for a biofuel impacted fleet in South America’s largest metropolitan área - Pereira, Guilherme Martins; Kamigauti, Leonardo Yoshiaki; Nogueira, Thiago; Gavidia, Mario Eduardo Gavidia; Santos, Djacinto Monteiro dos; Evtyugina, Margarita; Alves, Célia; Vasconcellos, Pérola de Castro; Freitas, Edmílson Dias de; Andrade, Maria de Fátima (Environmental Pollution, 2023)