Sant’ana, V. A. C., E. H. Birgel, A. M. F. Rosenfeld, and P. C. Soares. “Milk Proteinogram of the Cows Submitted to Milk Retention”. Brazilian Journal of Veterinary Research and Animal Science, vol. 43, no. 2, Apr. 2006, pp. 262-9, doi:10.11606/issn.1678-4456.bjvras.2006.26508.