Pascal Constantin and  Gîlcă Ioan and  Radu Rusu Răzvan and  Nacu Gherasim,  On the Influence of Certain Natural Factors on the Sperm Quality and Sexual Behaviour of Rams.   journal   = {International Journal of Animal and Veterinary Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2010, vol. 41(5). 307 - 310
    [viewed 21 April 2021]. Available from: