MAHAJAN, V., PARMAR, S. N. S., THAKUR, M. S., SHARMA, G., VAISHALI, V., & PATEL, M. (2012). Prolactin gene polymorphism and its association with milk production in Malvi, Nimari and Frieswal cattle. The Indian Journal of Animal Sciences, 82(4). https://epubs.icar.org.in/index.php/IJAnS/article/view/16689