WASET
    Abdurraouf Gaja and  Salah Al-Dahash and  Guru Solmon Raju and  Chikara Kubota,  Ultrasonic Assessment of Corpora Lutea and Plasma Progesterone Levels in Early Pregnant and Non Pregnant Cows.   journal   = {International Journal of Animal and Veterinary Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 1154 - 1156
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/9996822.