Selenium concentration and glutathione peroxidase (GPX-Px) activity in serum of cows at different stages of lactation - Pilarczyk, B; Jankowiak, D; Tomza-Marciniak, A; Pilarczyk, R; Sablik, P; Drozd, R; Tylkowska, A; Skolmowska, M (Biol Trace Elem Res, 2012)
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