WASET
    Lāsma Cielava and  Daina Jonkus and  Līga Paura,  The Effect of Cow Reproductive Traits on Lifetime Productivity and Longevity.   journal   = {International Journal of Animal and Veterinary Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 123(3). 220 - 223
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10006512.