Santiani A., Alexei, et al. “Flow Cytometry Evaluation of DNA Integrity of Alpaca Sperm After Cryopreservation With Analogues of Superoxide Dismutase”. Revista De Investigaciones Veterinarias Del Perú, vol. 23, no. 2, June 2012, pp. 182-91, https://doi.org/10.15381/rivep.v23i2.898.