ZARCO QUINTERO, L. A., C. VASQUEZ PELÁEZ, and J. DE LUCAS TRON. “Use of the Male Effect to Induce Reproductive Activity in Ovine Intensive Breeding Systems”. Veterinaria México OA, vol. 39, no. 2, Oct. 2009, https://veterinariamexico.fmvz.unam.mx/index.php/vet/article/view/205.