Viegas, Simone Assis Rosa de Aquino, et al. “Serologic Characterization and Typing of the Toxins Produced by Strains of Escherichia Coli Isolated from Swines With Diarrhoea in the State of São Paulo”. Brazilian Journal of Veterinary Research and Animal Science, vol. 29, no. supl., Dec. 1992, pp. 394-8, https://doi.org/10.11606/issn.1678-4456.bjvras.1992.52009.