E. S. Girão, R. N. Girão, and L. P. Medeiros, “Prevalence, infection intensity and seasonal variation of helminths in calves in the state of Piauí, Brazil”, PAB, vol. 20, no. 8, pp. 889–897, Oct. 2014, doi: 10.1590/S1678-3921.pab1985.v20.15906.