D. J. Zapata, Rodríguez B. de J., M. C. Ramírez, A. López H, and J. Parra S, “Escherichia coli lipopolysaccharide affects intestinal mucin secretion in weaned pigs”, Rev. colomb. cienc. pecu., vol. 28, no. 3, pp. 209–217, Jul. 2015.