Abdelrasoul and  Khalid Ahmed Elrabie,  Effect of Exercise on Sexual Behavior and Semen Quality of Sahiwal Bulls.   journal   = {International Journal of Biological and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2017, vol. 128(8). 618 - 621
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10007794.