Kozicki, L.E. 1991. Some effects of the gonadotrophines releasing hormone (GnRH) on the late puerperium of milking cows. Pesquisa Agropecuaria Brasileira. 26, 4 (Apr. 1991), 505–509. DOI:https://doi.org/10.1590/S1678-3921.pab1991.v26.3370.