Pegoraro, Eliezer José, et al. “Italian Ryegrass Management, Pasture Larval Contamination and Parasitic Infection in Sheep”. Pesquisa Agropecuaria Brasileira, vol. 43, no. 10, Oct. 2008, pp. 1397-03, doi:10.1590/S1678-3921.pab2008.v43.690.