Ancuelo, A. E., M. M. Landicho, G. A. Dichoso, and P. Sangel. 2021. “Superoxide Dismutase (SOD) Activity in Cryopreserved Semen of Itik Pinas-Khaki (Anas Platyrhynchos L.)”. Tropical Animal Science Journal 44 (2): 138-45. https://doi.org/10.5398/tasj.2021.44.2.138.