Zamora, J., Reinhardt, G., Polette, M., Macías, P., & González, I. (2000). Escherichia coli isolated from diarrheic piglets. Presumption of Cytotoxic Necrotizing Factor (CNF) producing-strains. Archivos De Medicina Veterinaria, 32(1), 75–81. https://doi.org/10.4067/S0301-732X2000000100009