Belém, P.A.D. et al. 1994. Gradation of microscopic lesions in pancreas of Eurytrema sp naturally infected cattle and its relationship with the parasite load and number of eggs per gram of faeces (EPG). Brazilian Journal of Veterinary Research and Animal Science. 31, 3-4 (Dec. 1994), 273–281. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.1994.52077.