Al-Taiy, M. K., and M. K. Al-Dulaimi. “Relationship of Luteinizing Hormone Concentration With Reproductive and Productive Performance in Holstein Cows Bred in Iraq”. Al-Furat Journal of Innovations in Agricultural Sciences, vol. 1, no. 1, Jan. 2021, pp. 16-25, https://journals.atu.edu.iq/index.php/afjias/article/view/61.