S. Azura, H. Ratnani, S. Susilowati, M. Hariadi, A. Samik, and K. Soepranianondo, “Effect of α-tocopherol supplementation in diluents on the motility, viability and plasma membrane integrity of Simmental bull spermatozoa after cooling”, Ovz, vol. 9, no. 1, pp. 1–6, May 2020.