Vieira, M.I.B. et al. 2008. Comparison of two methods for the control of gastrointestinal nematodes in lambs and ewes. Semina: Ciências Agrárias. 29, 4 (Aug. 2008), 853–860. DOI:https://doi.org/10.5433/1679-0359.2008v29n4p853.