S. I. E. . Putri, Nur Ducha, Erlix Rakhmad Purnama, and Wiwied Sawitri, “Comparison of Natural and Synthetic Antioxidant Supplementation in CEP Extender for Bali Cattle Frozen Semen: Perbandingan Pengaruh Penambahan Antioksidan Alami dan Sintetis dalam Pengencer CEP Semen Beku Sapi Bali”, J. I. AgriSains, vol. 26, no. 3, pp. 184–195, Dec. 2025.