Influence of somatotropin on level of insulin, T3,T 4, TSH, BST in blood serum of dairy cows at various levels of crude protein in feed J. Siget, A. Sommer and P. PetrikovicAnn. Zootech., 44 Suppl. 1 (1995) 280DOI: https://doi.org/10.1051/animres:199505245