Camargo, M.I. de et al. 2008. Mensuration of sialic acid seric level in nelore cattle exposed and nonexposed to bracken fern (Pteridium aquilinum). Semina: Ciências Agrárias. 29, 2 (Aug. 2008), 393–398. DOI:https://doi.org/10.5433/1679-0359.2008v29n2p393.