Amarante, A.F.T. et al. 1992. Survey of anthelmintic treatment with oxfendazole, ivermectin and levamisole in sheep flocks. Brazilian Journal of Veterinary Research and Animal Science. 29, 1 (Jun. 1992), 31–38. DOI:https://doi.org/10.11606/issn.1678-4456.bjvras.1992.51949.