(en) J. P. Braun, D. Tainturier, C. Laugier, P. Benard, J. P. Thouvenot et A. G. Rico, «Early variations of blood plasma gamma-glutamyl transferase in newborn calves--a test of colostrum intake», J Dairy Sci(nl), 1982;65(11):p.2178-2181 (PMID6130106, DOI10.3168/JDS.S0022-0302(82)82479-X).
(en) J. Bouda, V. Dvorak, E. Minksovar et R. Dvorak, «The activities of GOT, gamma-GT, alkaline phosphatase in blood of cows and their calves fed from buckets», Acta Vet (Brno)(cs), 1980;49(3-4): p.193-198 (DOI10.2754/avb198049030193).
(en) J. P. Braun, D. Tainturier, C. Laugier, P. Benard, J. P. Thouvenot et A. G. Rico, «Early variations of blood plasma gamma-glutamyl transferase in newborn calves--a test of colostrum intake», J Dairy Sci(nl), 1982;65(11):p.2178-2181 (PMID6130106, DOI10.3168/JDS.S0022-0302(82)82479-X).