T. dos Santos, Geraldo, et al. “Newborn Calf Intestinal Absorption of Immunoglobulins Extracted from Bovine Colostrum”. Pesquisa Agropecuaria Brasileira, vol. 24, no. 1, Apr. 2014, pp. 75-83, doi:10.1590/S1678-3921.pab1989.v24.13772.