References
- Thompson , KG , Fraser , AJ , Harrop , BM and Kirk , JA . 1980 . Glutathione peroxidase activity in bovine serum and erythrocytes in relation to selenium concentrations of blood, serum and liver . Research in Veterinary Science , 28 : 321 – 324 .
- Thompson , KG , Fraser , AJ , Harrop , BM , Kirk , JA , Bulllians , J and Cordes , DO . 1981 . Glutathione peroxidase activity and selenium concentration in bovine blood and liver as indicators of dietary selenium intake . New Zealand Veterinary Journal , 29 : 3 – 6 .