Valentim R, Arruda RP, Barnabe RC, Alencar MM. Testicular biometry of Nellore (Bos taurus indicus) and crossbred bulls (Bos taurus indicus x Bos taurus taurus) at 20 and 24 months of age. Braz. J. Vet. Res. Anim. Sci. 2002;39(3):113-120. doi:10.1590/S1413-95962002000300001