Balamurugan, B., S. Mehrotra, V. Tejaswi, A. Bhimte, M. Ramamoorthy, V.P. Maurya, and G. Singh. 2018. “Effect of High Energy Diet With Additional Supplementation of Copper, Zinc, Selenium and Vit. E During the Transition Period on Ovarian Steroids and Reproductive Performance in the Crossbred Cows”. International Journal of Livestock Research 8 (10). India:97-104. http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1540.