G. S. Kumar and N. S. Parihar, “Immunological response to PPD and phosphatide antigens in buffaloes experimentally infected with Mycobacterium bovis”, Indian J of Anim Sci, vol. 69, no. 2, Jul. 2012, Accessed: Oct. 24, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/20257