Viana, Hildo Áurio, and Paulo Roberto C. Ferreira. “Ambiental Factors and Sex Effects on Calving Interval of Nelore Females”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 8, Apr. 2014, pp. 937-42, doi:10.1590/S1678-3921.pab1983.v18.15399.