N.H, H., and A. R.B. “Movement Characteristics and Ultrastructural Studies of Fresh and Acrosome-Reacted Jermasia Goat Sperm”. Malaysian Journal of Science, vol. 24, no. 2, Aug. 2005, pp. 7-11, https://samudera.um.edu.my/index.php/MJS/article/view/8296.