Pena, L.J. et al. 2006. Seroepidemiological survey of infection of equine infectious anemia, equine influenza type 2 and equine herpesvirus type 1 in herds of south Pará State, Brazil. Brazilian Journal of Veterinary Research and Animal Science. 43, 4 (Aug. 2006), 537–542. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26470.