Expression of androgen-producing enzymes in nelore and angus heifers with low and high numbers of follicles in the ovary - Loureiro, B. [UNESP]; Ereno, R. L. [UNESP]; Favoreto, M. G. [UNESP]; Pupulim, A. G. [UNESP]; Buratini, J. [UNESP]; Barros, C. M. [UNESP] (CSIRO Publishing, 2013)