The Quality of Chilled Fat Tail Sheep Ram’s Semen with Antioxidant Addition, Vitamin C and Vitamin E In Citrate Egg Yolk Extender - abdillah, labib; Bintara, Sigit; Maharani, Dyah; Budisatria, I Gede Suparta (Faculty of Animal Science, Universitas Gadjah Mada, ISSTAP 2017, 2017)