Berek, F.L. et al. 2021. The Effect of Long Shelf Life of Duroc Pig Male Semen Diluted Using Tris-Egg Yolk-Young Coconut Water on The Value of Viability, Abnormality and pH. Journal of Tropical Animal Science and Technology. 3, 2 (Aug. 2021), 108–120. DOI:https://doi.org/10.32938/jtast.v3i2.1201.