Genetic associations between age at first calving and heifer body weight and acrotal circumference in nelore cattle - Grossi, D. A.; Venturini, G. C.; Paz, C. C. P.; Bezerra, L. A. F.; Lôbo, Raysildo Barbosa; Oliveira, J. A.; Munari, D. P. (Journal of Animal Breeding and Genetics, 2009)