Varela G., E. et al. 2019. Effect of low-density lipoproteins and trehalose on antioxidant enzymatic activity of cryopreserved bovine semen. Revista de Investigaciones Veterinarias del Perú. 30, 1 (Mar. 2019), 256–264. DOI:https://doi.org/10.15381/rivep.v30i1.15680.