Asmatullah Kaka, Wahid Haron, Rosnina Yusoff , Nurhusien Yimer, A.M Khumran, Akeel Ahmed Memon, Kazhal Sarsaifi and Mahdi Ebrahimi, 2017. Frozen-Thawed Quality of Bull Semen after Combined Supplementation of Docosahexaenoic Acid and Alpha Linolenic Acid into Tris based Semen Extender. Pakistan J. Zool., 49: 2051-2055.