ErianiK., AzharA., IhdinaM., RosadiB., RizalM., and BoedionoA. “Quality Enhancement of Aceh Swamp Buffalo (Bubalus Bubalis) Frozen Semen by Supplementing β-Carotene”. Tropical Animal Science Journal, Vol. 41, no. 1, Apr. 2018, pp. 1-7, doi:10.5398/tasj.2018.41.1.1.