Malondialdehyde Level in Seminal Plasma of Cryopreserved Holstein Bull Semen after Addition of Zinc, Cysteine, Prostaglandin F2α and their Combination in vitro - Al-Dahan, M. R. G.; Majeed, A. F.; Abed, M. A.; Ibrahim, F. F.; yahya, K. J. (مجلة الانبار للعلوم البيطرية)