Rashmi, S., A. Sahadev, M. Narayana Swamy, B. M. Ravindranath, C. R. Santhosh, S. Naveen Kumar, and B. N. Nagaraja. 2020. “Comparative Evaluation of Early Pregnancy Diagnostic Methods in Dairy Cows”. International Journal of Livestock Research 10 (5). India:71-77. https://doi.org/10.5455/ijlr.20200109120845 .